Dp Engineers

Pandav Nagar, Delhi

series 1950 explosion proof differential pressure switch (series 1950)

set points from .03 to 20 in w.c., explosion-proof and weatherproof

series 1950 explosion-proof differential pressure switch combines the best features of the popular dwyer series 1900 pressure switch with an integral explosion-proof and weatherproof housing, making it an exceptional value for either application. It is ce, ul and csa listed, fm approved for use in class i, div 1, groups c and d, class ii groups e, f, and g and class iii hazardous atmospheres (nema 7 & 9), raintight nema 3 (ip54). Weatherproof features include a drain plug and o-ring seal in cover. Electrical connections are easily made by removing front cover. For convenience the set point adjustment screw is located on the outside of the housing. Twelve models offer set points from .03 to 20 in w.c. (0.0075 to 5 kpa) and from .5 to 50 psi (0.035 to 3.5 bar). The unit is very light and compact about half the weight and bulk of other explosion-proof or weather-proof switches with separate enclosures.

caution: for use only with air or compatible gases. Applications with hazardous atmospheres and a single positive pressure may require special venting.

product applications

hvac applications

process applications

all-weather applications

modeldescription

1950-00-2fdifferential pressure switch, range .07-.15"w.c., approx.deadband @ min.set point 0.04, approx.deadband @ max.set point 0.05.

1950-02-2sdifferential pressure switch, range .03-.10"w.c., approx.deadband @ min.set point 0.025, approx. Deadband @ max.set point 0.05.

1950-0-2fdifferential pressure switch, range .15-.50"w.c., approx. Deadband @ min.set point 0.10, approx.deadband @ max.set point 0.15.

1950-10-2fdifferential pressure switch, range 3-11"w.c., approx.deadband @ min.set point 0.40, approx.deadband @ max.set point 0.50.

1950-1-2fdifferential pressure switch, range .4-1.6"w.c., approx.deadband @ min.set point 0.15, approx.deadband @ max.set point 0.20.

1950-20-2fdifferential pressure switch, range 4-20"w.c., approx.deadband @ min.set point 0.40, approx.deadband @ max.set point 0.60.

1950-5-2fdifferential pressure switch, range 1.4-5.5"w.c., approx.deadband @ min.set point 0.30, approx.deadband @ max. Set point 0.40.

1950p-15-2fdifferential pressure switch, range 3-15 psid, approx.deadband @ min.set point 0.9, approx. Deadband @ max. Set point 0.9.

1950p-2-2fdifferential pressure switch, range 0.5-2 psid, approx.deadband @ min.set point 0.3, approx.deadband @ max.set point 0.3.

1950p-25-2fdifferential pressure switch, range 4-25 psid, approx.deadband @ min.set point 0.7, approx.deadband @ max.set point 0.7.

1950p-50-2fdifferential pressure switch, range 15-50 psid, approx.deadband @ min.set point 1.0, approx.deadband @ max. Set point 1.5.

1950p-8-2fdifferential pressure switch, range 1.5-8 psid, approx.deadband @ min.set point 1.0, approx.deadband @ max.set point 1.0.

features

explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation

external set point screw provides easy access that simplifies making adjustments without opening or disassembling enclosure

easily accessible electrical connection simplifies the installation

condition : new

weight :3.25 lb (1.5 kg); 1950-02 model 4.4 lb (2 kg).

type :explosion proof switch

enclosure rating:nema 3 (ip54), nema 7 and 9.: switch type:single-pole double-throw (spdt).

temperature limits:-40 to 140f (-40 to 60c); 0 to 140f (-17.8 to 60c)for 1950p-8, 15, 25, and 50.-30 to 130f (-34.4 to 54.4c) for 1950-02.: pressure limits:continuous: 1950's - 45

set point adjustment:screw type on top of housing.: weight:3.25 lb (1.5 kg); 1950-02 model 4.4 lb (2 kg).

Flotect Mini Size Flow Switches

Series V6 Flotect Mini-Size Flow Switches

Monitor Flow in 1/2" to 2" (12.70 to 50.80 mm) Pipe, Explosion-Proof, Compact

The Series V6 Flotect Flow Switch is surprisingly compact, and specifically engineered to monitor liquid, gas, or air flows. Time tested in thousands of pipeline installations and processing plants around the world, this Series is Weatherproof, designed to meet NEMA 4 and Explosion-proof (listing included in specifications). Tees are available for installation in pipelines from 1/2" to 2" (12.70 to 50.80 mm). With bushings added the unit is easily adapted to 1/4" and 3/8" (6.35 and 9.53 mm) piping.

Specifications

Service:Gases or liquids compatible with wetted materials.

Wetted Materials:Standard V6 Models: Vane: 301 SS; Lower Body: brass or 303 SS; Magnet: ceramic; Other: 301, 302 SS; Tee: brass, iron, forged steel, or 304 SS.

V6 Low Flow Models: Lower body: brass or 303 SS; Tee: brass or 304 SS; Magnet: ceramic; O-ring: Buna-N standard, Fluoroelastomer optional; Other: 301, 302 SS.

Temperature Limits:-4 to 220F (-20 to 105C) Standard, MT high temperature option 400F (205C) (MT not UL, CSA, ATEX, IECEx or KC) ATEX Compliant AT, IECEx IEC Option and KC (KC Option), Ambient Temperature -4 to 167F (-20 to 75C) Process Temperature: -4 to 220F (-20 to 105C).

Pressure Limit:Brass lower body with no tee models 1000 psig (69 bar), 303 SS lower body with no tee models 2000 psig (138 bar). Brass tee models 250 psi (17.2 bar), iron tee models 1000 psi (69 bar), forged and stainless steel tee models 2000 psi (138 bar), low flow models 1450 psi (100 bar).

Enclosure Rating:Weatherproof and Explosion-proof. Listed with UL and CSA for Class I, Groups A, B, C and D; Class II, Groups E, F, and G. (Group A on stainless steel body models only).ATEX 0344 II 2 G Ex d IIC T6 Gb Process Temp75C Alternate Temperature Class T5 Process Temp90C, 115C (T4) Process Temp 105C consult factory. IECEx Certificate of Conformity: IECEx DEK 11.0039; IECEx Standards: IEC 60079-0: 2007; IEC 60079-1: 2007; Korean Certified (KC) for: Ex d IIC T6 Gb Process Temp =75C; KTL Certificate Number: 2012-2454-75.

Switch Type:SPDT snap switch standard, DPDT snap switch optional.Electrical Rating:UL models: 5 A @125/250 VAC. CSA, ATEX and IECEx models: 5 A @ 125/250 VAC (V); 5A res., 3 A ind. @ 30 VDC (V ). MV option: .1 A @ 125 VAC (V).MT option:5 A @125/250 VAC (V). [MT option not UL, CSA, ATEX or IECEx].

Electrical Connections:UL models: 18 AWG, 18" (457.20 mm) long. ATEX/CSA / IECEx models: terminal block.

Upper Body:Brass or 303 stainless steel.

Conduit Connections:3/4" (19.05 mm) male NPT standard, 3/4" (19.05 mm) female NPT or M25 with BSPT option on junction box models.

Process Connection:1/2" (12.70 mm) male NPT or 1/2" (12.70 mm) male BSPT on models without a tee.

Mounting Orientation:Switch can be installed in any position but the actuation/deactuation flow rates in the charts are based on horizontal pipe runs and are nominal values.

Set Point Adjustment:Standard V6 models none. Without tee models vane is trimmable. Low flow models are field adjustable in the range shown. See set point charts on Catalog page.

Weight:2 to 6 lb (.9 to 2.7 kg) depending on construction.

Options not Shown:Custom calibration, bushings, PVC tee, reinforced vane, DPDT relays.

Agency Approvals:ATEX, CE, CSA, IECEx, KTL, UL.

Material : BRASS

Type : Series V6 Flotect Mini-Size Flow Switches

Temperature : -4 To 220F (-20 To 105C)

Application : Gases Or Liquids Compatible With Wetted Materials.

Operating Temperature : -4 To 220F (-20 To 105C)

Brand Name : DWYER USA

Certification : YES

series adps/edps differential pressure switch (series adps/edps)

model description

adps-03-1-nadjustable differential pressure switch, set point range 0.20 to 2.00" w.c., 1/2" npt connection.

adps-03-2-nadjustable differential pressure switch, set point range 0.20 to 2.00" w.c., m20 connection.

adps-03-2-n-cadjustable differential pressure switch, set point range 0.20 to 2.00" w.c., m20 connection, with two static tips and 7 ft (2.1 m) of pvc tubing.

adps-04-1-nadjustable differential pressure switch, set point range 0.12 to 1.60" w.c., 1/2" npt connection.

adps-04-2-nadjustable differential pressure switch, set point range 0.12 to 1.60" w.c., m20 connection.

adps-04-2-n-cadjustable differential pressure switch, set point range 0.12 to 1.60" w.c., m20 connection, with two static tips and 7 ft (2.1 m) of pvc tubing.

adps-05-1-nadjustable differential pressure switch, set point range 0.80 to 4.00" w.c., 1/2" npt connection.

adps-05-2-nadjustable differential pressure switch, set point range 0.80 to 4.00" w.c., m20 connection.

adps-05-2-n-cadjustable differential pressure switch, set point range 0.80 to 4.00" w.c., m20 connection, with two static tips and 7 ft (2.1 m) of pvc tubing.

adps-06-1-nadjustable differential pressure switch, set point range 2.00 to 10.00" w.c., 1/2" npt connection.

adps-06-2-nadjustable differential pressure switch, set point range 2.00 to 10.00" w.c., m20 connection.

adps-06-2-n-cadjustable differential pressure switch, set point range 2.00 to 10.00" w.c., m20 connection, with two static tips and 7 ft (2.1 m) of pvc tubing.

adps-07-1-nadjustable differential pressure switch, set point range 4.00 to 20.00" w.c., 1/2" npt connection.

adps-07-2-nadjustable differential pressure switch, set point range 4.00 to 20.00" w.c., m20 connection.

adps-07-2-n-cadjustable differential pressure switch, set point range 4.00 to 20.00" w.c., m20 connection, with two static tips and 7 ft (2.1 m) of pvc tubing.

adps-08-1-nadjustable differential pressure switch, set point range 0.08 to 1.20" w.c., 1/2" npt connection.

adps-08-2-nadjustable differential pressure switch, set point range 0.08 to 1.20" w.c., m20 connection.

adps-08-2-n-cadjustable differential pressure switch, set point range 0.08 to 1.20" w.c., m20 connection, with two static tips and 7 ft (2.1 m) of pvc tubing.

edps-03-1-nadjustable differential pressure switch, range .20-2.00" w.c., with 1/2" npt connection.

edps-03-2-nadjustable differential pressure switch, range .20-2.00" w.c., with m20 connection.

edps-04-1-nadjustable differential pressure switch, range .12-1.60" w.c., with 1/2" npt connection.

edps-04-2-nadjustable differential pressure switch, range .12-1.60" w.c., with m20 connection.

edps-05-1-nadjustable differential pressure switch, range .80-4.00" w.c., with 1/2" npt connection.

edps-05-2-nadjustable differential pressure switch, range .80-4.00" w.c., with m20 connection.

edps-06-1-nadjustable differential pressure switch, range 2.00-10.00" w.c., with 1/2" npt connection.

edps-06-2-nadjustable differential pressure switch, range 2.00-10.00" w.c., with m20 connection.

edps-07-1-nadjustable differential pressure switch, range 4.00-20.00" w.c., with 1/2" npt connection.

edps-07-2-nadjustable differential pressure switch, range 4.00-20.00" w.c., with m20 connection.

edps-08-1-nadjustable differential pressure switch, range .08-1.20" w.c., with 1/2" npt connection.

edps-08-2-nadjustable differential pressure switch, range .08-1.20" w.c., with m20 connection.

type : differential pressure switch

brand name : dwyer usa

material : plastic

vane flow switch (series fs-2)

the series fs-2 vane flow switches offers an economical flow proving solution. The fs-2 paddles are adjustable to fit 1 to 8" size pipe.

features:

field adjustable set point adjustment screw allows for easy flow switch modification

custom application set points enabled by field adjustable vane layers

aluminum weatherproof housing permits outdoor installation

specification:

service : compatible liquids.

wetted materials : bellow: tin-bronze; vane: ss; body: forged brass.

electrical connection : cable gland with attached wire leads or optional conduit connection.

mounting orientation : switch must be installed vertically on horizontal pipe runs.

set point adjustment : four vane combinations and an adjustment screw.

enclosure : die-cast aluminum alloy.

other details:

modeldescription

fs-2paddle flow switch, 1" male npt.

fs-2-bsptpaddle flow switch, 1" male bspt.

fs-2-cndpaddle flow switch, npt process connection, conduit electrical connection

fs-2-w8paddle flow switch, 1" male npt connection with 8 ft leads

installation:

unpack and remove any packing material found in the lower housing. Install in piping with the arrow pointing in the direction of flow. The switch must be installed vertically on horizontal pipe runs. To ensure a steady working flow, make certain to keep the paddle flow switch a safe distance from sources of turbulence such as elbows, valves, pumps, etc. The recommended minimum distance upstream and downstream of the flow switch is about 5 times the pipes diameter.

maintenance:

inspect and clean wetted parts at regular intervals. The cover should be in place at all times to protect the internal components from dirt, dust, and weather. Disconnect the device from the supply circuit before opening to prevent ignition of hazardous atmosphere.

the model fs-2 paddle flow switch is not field serviceable and should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the problem plus any relevant application notes. Contact customer service to receive a return goods authorization number before shipping.

certification : yes

type : vane type flow switch

brand name : dwyer usa

temperature : 230 degree f (110 degree c).

material : bellow: tin-bronze; vane: ss; body: forged brass

application : compatible liquids.

temperature limits:230f (110c). : pressure limits:145 psig (10 bar).

process connection:1" male npt or bspt. : mounting orientation:switch must be installed vertically on horizontal pipe runs.

enclosure rating:nema 4 (ip64). : switch type:spdt snap switch.

service:compatible liquids. : wetted materials:bellow: tin-bronze; vane: ss; body: forged brass.

electrical rating:10 a res, 3 a ind @ 250 vac. : electrical connection:cable gland with attached wire leads or optional conduit connection.

weight:28.22 oz (0.8 kg). : agency approvals:ce.

set point adjustment:four vane combinations and an adjustment screw. : enclosure:die-cast aluminum alloy.

v10 flotect mini size flow switches

series v10 flotect mini-size flow switch

proof of flow or no flow in 1/2" to 2" pipe, cost effective, leak proof body, weatherproof

the series v10 flotect mini-size flow switches is designed to provide inexpensive, reliable monitoring of the presence or absence of flow in a system. This series is available for field installation in pipelines from 1/2 to 2" diameter and available in brass or 303 ss body.

product applications

proving flow in boilers, hot water heaters, and chillers

protects pumps, motors and other equipment against low or no flow

automatically starts auxiliary pumps and engines

model description

v10mini-size flow switch, brass, normally open or closed.

v10ssmini-size flow switch, 303 ss, normally open or closed.

specifications

service:compatible gases or liquids.

wetted material:vane: 301 ss; body: brass or 303 ss; pin and magnet: ceramic 8.

temperature limit:200f (93c).

pressure limit:brass body: 1000 psig (69 bar), 303 ss body: 2000 psig (138 bar).

enclosure rating:weatherproof, meets nema 4x (ip66).

switch type:spst hermetically sealed reed switch. Field adjustable for normally open or normally closed.

electrical rating:0.5 a @ 120 vac; 1.5 a @ 24 vdc res.; 0.001 a @ 200 vdc res.

electrical connections:18 awg, 19" (483 mm) long, pvc jacket. Rated 221f (105c).

process connection:1/2" male npt standard. Contact factory for other options.

mounting orientation:switch can be installed in any position but the actuation/deactuation flow rates are based on horizontal pipe runs and are nominal values.

set point adjustment:vane is trimmable.

weight:5.5 oz (0.16 kg).

agency approvals:ce, csa, ur.

switch enclosure:nylon.

features

magnetically actuated switching design gives superior performance with rugged, hermetically sealed reed switch

simple field switch adjustment allows user to toggle between normally open (no) or normally closed (nc) with no change in the electrical connection

switch housing is located outside the process media, allowing simple switch changeover or maintenance without interruption of process flow

full size, field trimmable stainless steel vane provided with removable template calibrated for brass or ductile iron reducing tees with forged steel straight tee/bushing combinations

related products

series sfi-100 & sfi-300 midwest sight flow indicator

series sfi-100 & sfi-300 midwest sight flow indicator

series sfi-400 midwest sight flow indicator

series sfi-400 midwest sight flow indicator

series sfi-700 midwest sight flow indicator

series sfi-700 midwest sight flow indicator

certification : yes

type : v10 flotect mini size flow switches

brand name : dwyer usa

application : compatible gases or liquids.

temperature : 200f (93c).

operating temperature : 200f (93c).

material : vane: 301 ss; body: brass or 303 ss; pin and magnet: ceramic 8.

high pressure brass flow switch

series p8 high pressure brass flow switch

up to 1500 psi, fixed setpoint, up to 2.0 gpm, rugged brass body

the series p8 high pressure brass flow switches are ideal for high in-line pressures. Set points range from 0.25 to 2.0 gpm for liquid flow.

product applications

industrial cleaning equipment

high pressure lubrication systems

model description

p8-11high pressure brass flow switch, actuation set point 0.25 gpm (.95 lpm).

p8-12high pressure brass flow switch, actuation set point 0.50 gpm (1.89 lpm).

p8-13high pressure brass flow switch, actuation set point 1.0 gpm (3.79 lpm).

p8-14high pressure brass flow switch, actuation set point 1.5 gpm (5.68 lpm).

p8-15high pressure brass flow switch, actuation set point 2.0 gpm (7.57 lpm).

specifications

service:compatible liquids.

wetted materials:housing: brass; piston: pps composite, epoxy; spring: 316 ss; o-ring: flourocarbon.

temperature limits:-20 to 275f (-28 to 135c).

pressure limits:1500 psi (103.4 bar).

accuracy:20% of set point.

switch type:spst, no.

electrical rating:.17 a @ 120 vac, .08 a @ 240 vac, .13 a @ 120 vdc, .06 a @ 240 vdc.

electrical connection:no. 22 awg, 24" (61 cm) polymeric leads.

process connections:3/8" male npt.

mounting orientation:any position. Set points shown are based on vertical, inlet down position.

required filtration:100 microns or better.

weight:6 oz (.17 kg).

agency approval:ce.

features

integrates a one-piece magnetic pps composite piston to handle pressure up to 1500 psi

less susceptible to clogging than other high in-line pressure switches with 100 micron filtration

related products

series sfi-100 & sfi-300 midwest sight flow indicator

series sfi-100 & sfi-300 midwest sight flow indicator

series sfi-400 midwest sight flow indicator

series sfi-400 midwest sight flow indicator

series sfi-700 midwest sight flow indicator

series sfi-700 midwest sight flow indicator

usage : compatible liquids.

type : high pressure brass flow switch

color : yellow

features : high quality, long working life

material : epoxy; spring: 316 ss; o-ring: flourocarbon.

brand name : dwyer usa

temperature limits:-20 to 275f (-28 to 135c). : pressure limits:1500 psi (103.4 bar).

v8 flotect vane operated flow switch (series v8)

the series v8 flotect vane operated flow switches is ideal for protecting unattended equipment from damage or loss of production.

features:

ul recognized as an industrial motor controller per ul standard 508, suitable for mounting in a protected environment

magnetically actuated switching design gives superior performance with free-swinging vane which attracts a magnet within the switch body, actuating a snap switch with no bellows, springs, or seals to fail

leak proof body and vane constructed of tough durable polyphenylene sulfide which has excellent chemical resistance

a full size trimmable vane is provided with molded-in graduations

specification:

service : compatible gases or liquids.

wetted materials : vane and body: polyphenylene sulfide (pps); pin and spring: 316 ss on inconel; magnet: ceramic 8.

enclosure rating : general purpose; wp/wp2 option is weatherproof.

switch type : spdt snap switch; mv option: spdt gold contact snap switch.

electrical rating : 5 a @ 125/250 vac, 5 a resistive, 3 a inductive @ 30 vdc. Mv option: 1 a @ 125 vac, 1 a resistive, 0.5 a inductive @ 30 vdc.

mounting orientation : actuation/deactuation flow rates are based on horizontal pipe run and are nominal values. Unit cannot be used with vertical down flow.

applications:

boiler flow proving, hot water heaters, chillers, cooling lines, machinery, liquid transfer systems

options:

gold plated contacts, for dry circuits. Rated 1a @ 125 vac; 1a resistive, 0.5a inductive @ 30 vdc. To order add suffix -mv. Example: v8-mv.inconel alloy option. Inconel alloy replaces standard 316 ss wetted parts. Wetted parts are inconel alloy, ceramic 8, and polyphenylene sulfide. To order add suffix -inc. Example: v8-inc.weatherproof enclosure (not ul approved). Optional housing provides weatherproof protection for electrical wiring. To order add suffix -wp (phenylpolioxide) or -wp2 (aluminum). Example: v8-wp or v8-wp2

installation:

the model v8 flow switch is intended for use in clean, compatible process media free from scale, debris and other foreign matter which might collect on the vane an impede its movement. Buildup from such materials will prevent proper operation.carefully unpack the switch being certain to remove any packing material which might have become lodged between the switch housing and the vane assembly. Note the pipe size indicators molded into the vane. By trimming at the mark corresponding to the pipe size being used, approximate actuation/deactuation flows will be as shown in the charts at right. These values apply to installations with a thred-o-let, branch connection or plastic fitting. If using standard 125-250 lb. Bronze, iron or steel fittings, trim the vane 0.125 above the mark. Due to variations in fittings and amount of thread engagement, vane must be checked for proper operation.the flow switch must be properly indexed during installation. The arrow on the side must point in the direction of flow.use teflon thread tape or other suitable pipe joint compound to seal the 1 npt mounting connection. Avoid excess sealant which could interfere with vane movement and prevent proper operation. Do not exceed 50 ft/lbs (40 n/m) torque on the switch housing. Damage can result.wire in accordance with local electrical codes. Lead wire colors are as follows: black - common, red - normally open, blue - normally closed. Normal is the contact condition with no flow in the system. Closed contacts open and open contacts close when increasing flow reaches the actuation point.material : vane and body: polyphenylene sulfide (pps); pin and spring: 316 ss on inconel; magnet: ceramic 8.

application : boiler flow proving, type : vane type flow switch, brand name : dwyer usa

certification : yes

Flotect Vane Operated Flow Switch

Series V4 Flotect Vane-Operated Flow Switch

Field Adjustable Dependable Protection Against Flow Variation or Stopping in Pipelines for Fluids, Gases and Flowing Solids

The Series V4 Flotect Flow Switches are rugged and reliable, ideal for automatically protecting equipment and pipeline systems against damage from reduction or loss of flow. Time tested in thousands of pipeline installations and processing plants around the world this Series is Weatherproof, designed to meet NEMA 4 and Explosion-proof (listing included in specifications). This series can be used in pipes 1-1/2" (38.10 mm) and up.

Product Applications

Protects pumps,

motors and other equipment against low or no flow

Controls sequential operation of pumps

Automatically starts auxiliary pumps and engines

Stops liquid cooled engines,

machines and processing when coolant flow is interrupted

Shuts down burner when air flow through heating coil fails

Controls dampers according to flow

ModelDescription

V4-2-D-UVane operated flow switch, brass body, universal vane.

V4-2-UVane operated flow switch, brass body, universal vane.

V4-SS-2-D-UVane operated flow switch, 316SS body, universal vane.

V4-SS-2-UVane operated flow switch, 316SS body, universal vane

Specifications

Service:Gases or liquids compatible with wetted materials.

Wetted Materials:Vane: 316 SS; Body: Brass or 316 SS standard; Magnet Keeper: 430 SS standard, 316 SS optional; Options: Other materials also available, consult factory (e.g. PVC, Hastelloy, Nickel, Monel, Titanium).

Temperature Limit:-4 to 275F (-20 to 135C) standard, MT high temperature option 400F (205C) [MT option not UL, CSA, ATEX or IECEx] ATEX and IECEx options, ambient temperature -4 to 163F (-20 to 73C); Process temperature -4 to 163F (-20 to 73C).

Pressure Limit:Brass body 1000 psig (69 bar), 316 SS body 2000 psig (138 bar), optional 5000 psig (345 bar) available with 316 SS body and SPDT switch only.

Enclosure Rating:Weatherproof and Explosion-proof. **Listed with UL and CSA for Class I, Groups C and D; Class II, Groups E, F, and G. ATEX CE 0344 EX II 2 G Ex d IIB T6 Gb -20CTamb73C. -20CProcess Temp73C. EC-Type Certificate No.: KEMA 03 ATEX 2383. ATEX Standards: EN60079-0: 2009; EN60079-1: 2007.

IECEx Certified: For Ex d IIB T6 Gb - 20CTamb73C. -20CProcess Temp73C. IECEx Certificate of Conformity: IECEx DEK 11.0071. IECEx Standards: IEC 60079-0: 2007; IEC 60079-1: 2007. Zone I. Also FM approved.

Switch Type:SPDT snap switch standard, DPDT snap switch optional.

Electrical Rating:UL, FM, ATEX and IECEx models 10 A @ 125/250 VAC. CSA models: 5 A @ 125/250 VAC; 5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @125 VAC; 1 A res., .5 A ind. @ 30 VDC. MT option: 5 A @ 125/250 VAC. [MT and MV option not UL, CSA, FM or ATEX or IECEx].

Electrical Connections:UL and CSA models: 16 AWG, 6" (152 mm) long. ATEX and IECEx unit: Terminal block.

Conduit Connection:3/4" female NPT or 19.05 mm standard or M25 with -BSPT option.

Process Connection:1-1/2" male NPT or 1-1/2" male BSPT or 38.10 mm.

Mounting Orientation:Within 5 of vertical for proper operation. Units for horizontal installation (vertical pipe with up flow) available.

Set Point Adjustment:For universal vane: five vane combinations.

Weight:4 lb 8 oz (1.9 kg).

Agency Approvals:ATEX, CE, CSA, FM, IECEx, UL**.**No housing option (-NH) has no approvals

Certification : YES

Application : Gases Or Liquids Compatible With Wetted Materials.

Material : 316 SS Standard

Brand Name : DWYER USA

Type : Vane Type Flow Switch

Bourdon Tube Pressure Switches (Series DA/DS)

series da/ds bourdon tube pressure switches

pressure ranges to 8000 psi (551.6 bar)

customers tell us that the series da/ds bourdon tube pressure switches are the best pressure switches made. The mercoid da/ds series is one of the worlds broadest lines of pressure switches. The da/ds series has extremely high sensitivity and great repeatability. The da models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, the difference between high and low setpoints, is adjustable over the full-scale. The ds models are equipped with a single external adjustment for setting operating point only. For mercury-free switches, choose between the snap action switch or hermetically sealed snap action switch. Hermetically sealed mercury switch also available.product applications : compressors, mechanical hvac or process equipment, pump control, specifications :wetted materials:brass, 403 ss, or 316 ss., temperature limit:180f (82c).pressure limit:maximum pressure of the operating range.enclosure rating:general purpose, weatherproof or explosion-proof.repeatability:1% of full operating range, 1.5% on ds-7300 models.

switch type:spst mercury switch, spdt mercury switch, spdt snap switch, or spdt hermetically sealed snap switch. Other circuit types available.

electrical rating:see catalog page.

electrical connections:screw terminal.

conduit connection:general purpose: 1/2" hole for conduit hub. Weatherproof: 1/2" conduit hub. Explosion-proof: 3/4" female npt.

process connection:general purpose and weatherproof: 1/4" male npt; 1/2" male npt on range 15s and 16s. Explosion-proof: 1/2" male npt and 1/4" female npt.

mounting orientation:vertical.

set point adjustment:thumbscrew.

weight:general purpose: 4 lb (1.8 kg). Weatherproof: 6 lb (2.7 kg). Explosion-proof: 8 lb (3.5 kg).

deadband:see catalog page.

agency approvals:csa, fm, ul. (consult factory for fm approval models.)