Marck Engineers

Udhna, Surat, Gujarat

Check valve is a mechanical device, a valve, that normally allows a fluid to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Although they are available in a wide range of sizes and costs, many check valves are very small, simple, and or cheap. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of metal. An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking

Butterfly valves are quick opening valves that consist of a metal circular disc or vane with its pivot axes at right angles to the direction of flow in the pipe, which when rotated on a shaft, seals against seats in the valve body. They are normally used as throttling valves to control flow. Unlike ball valves, butterfly valves do not have any pockets in which fluids may become trapped when the valve is closed.

Gate valves are characterised as having either a rising or a nonrising stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated. Nonrising stem valves may have a pointer threaded onto the upper end of the stem to indicate valve position, since the gate travels up or down the stem on the threads without raising or lowering the stem. Nonrising stems are used underground or where vertical space is limited. Bonnets provide leakproof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger valves and higher pressure applications.

Features

• Wedge: furnished with solid/flexible design at specific request of the user/client.
• Special flange facings can be given to suit specific applications (e.g. Large or small male or female face-ring joint face etc.)
• The valve can be supplied with matching electrically operated actuator for remote/automated control and operation.
• By-pass arrangment/position indicator/extension stem with or without floor stand cane be provided on request.
• Pressure seal design bonnet can be given at specific request of the user/client.
• The design and technical data furnished here are subject to change due to continious product development

Gate valves are characterised as having either a rising or a nonrising stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated. Nonrising stem valves may have a pointer threaded onto the upper end of the stem to indicate valve position, since the gate travels up or down the stem on the threads without raising or lowering the stem. Nonrising stems are used underground or where vertical space is limited. Bonnets provide leakproof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger valves and higher pressure applications.

Features

• Wedge: furnished with solid/flexible design at specific request of the user/client.
• Special flange facings can be given to suit specific applications (e.g. Large or small male or female face-ring joint face etc.)
• The valve can be supplied with matching electrically operated actuator for remote/automated control and operation.
• By-pass arrangment/position indicator/extension stem with or without floor stand cane be provided on request.
• Pressure seal design bonnet can be given at specific request of the user/client.
• The design and technical data furnished here are subject to change due to continious product development

Hand Wheel Operated Globe Valves are designed for flow control or on/off isolation of fluids. they are manufactured in straight patterns, angle patterns, oblique patterns and needle designs with a large variety of internal seat construction variants to handle high pressure flow control duties, a wide choice of metal body options and trims means globe valves are widely used throughout industry.
Hand Wheel Operated Globe Valves designs consist of O, S & Y type, rising spindle and bolted bonnets, the valve comprises of a solid rotating plug type disc which is fine lapped, back seat facilities provides easy replacement of gland packing under pressure. extra deep stuffing box ensures fluid tightness, long packing life and low emissions. we offer globe valves with special packings, suitable for thermic fluid temperature up to 425 c.

Features

• Globe valves - steel bolted bonnet
• Globe valves - steel pressure seal bonnet
• Globe valves - cryogenic service
• Globe valves - cast iron 0, S & Y
• Globe valves - bellow seal
• Globe valves - chlorine service

Hand Wheel Operated Globe Valves are designed for flow control or on/off isolation of fluids. they are manufactured in straight patterns, angle patterns, oblique patterns and needle designs with a large variety of internal seat construction variants to handle high pressure flow control duties, a wide choice of metal body options and trims means globe valves are widely used throughout industry.
Hand Wheel Operated Globe Valves designs consist of O, S & Y type, rising spindle and bolted bonnets, the valve comprises of a solid rotating plug type disc which is fine lapped, back seat facilities provides easy replacement of gland packing under pressure. extra deep stuffing box ensures fluid tightness, long packing life and low emissions. we offer globe valves with special packings, suitable for thermic fluid temperature up to 425 c.

Features

• Globe valves - steel bolted bonnet
• Globe valves - steel pressure seal bonnet
• Globe valves - cryogenic service
• Globe valves - cast iron 0, S & Y
• Globe valves - bellow seal
• Globe valves - chlorine service

Check valve is a mechanical device, a valve, that normally allows a fluid to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Although they are available in a wide range of sizes and costs, many check valves are very small, simple, and / or cheap. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of metal.
An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.

Features

• Check valves - steel bolted cover swing type
• Check valves - steel pressure seal cover swing type
• Check valves - wafer
• Check valves - dual plate
• Check valves - non slam
• Check valves - flap type

Check valve is a mechanical device, a valve, that normally allows a fluid to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Although they are available in a wide range of sizes and costs, many check valves are very small, simple, and / or cheap. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of metal.
An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.

Features

• Check valves - steel bolted cover swing type
• Check valves - steel pressure seal cover swing type
• Check valves - wafer
• Check valves - dual plate
• Check valves - non slam
• Check valves - flap type

Check valve is a mechanical device, a valve, that normally allows a fluid to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Although they are available in a wide range of sizes and costs, many check valves are very small, simple, and / or cheap. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of metal.
An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.

Features

• Check valves - steel bolted cover swing type
• Check valves - steel pressure seal cover swing type
• Check valves - wafer
• Check valves - dual plate
• Check valves - non slam
• Check valves - flap type

Hand Wheel and Gear Operated

One of the most compact and light-weight valves available. Used for a wide range of applications, the choice of seat, lining and disc options has Increased significantly over recent years making the valve a popular choice. A wide range of materials, sizes and pressure ratings gives reliable positive isolation and moderate flow control capability over a wide range of applications throughout the industry. The metal seated valve is well established in petrochemical and oil industries being lightweight, firesafe and suitable for actuation. Butterfly valves offer a number of advantages when used for the proper application. They may be used in a wide variety of chemical services, they are available with small dimensions allowing for use in areas where space is limited, and they allow a high coefficient of flow.

Butterfly valves are quick opening valves that consist of a metal circular disc or vane with its pivot axes at right angles to the direction of flow in the pipe, which when rotated on a shaft, seals against seats in the valve body. They are normally used as throttling valves to control flow. Unlike ball valves, butterfly valves do not have any pockets in which fluids may become trapped when the valve is closed.

Other Models :
Butterfly Valves - Mdel - 12 & 12l
Butterfly Valves - Model - 44 & 44l
Butterfly Valves - Model - 98 Hygiene
Butterfly Valves - Model - 81
Butterfly Valves - Model - 85f
Butterfly Valves - Model - 91 & 91l (High Performance Double Offset)
Butterfly Valves - Model - 93 & 93l (High Performance Triple Offset)

Special Features :

• Clear Water Having Turbidity upto 5000 ppm and Temperature upto 45 C.
• Other Fluids with Maximum Pressure / Temperature Conditions within the Scope of IS: 14846.
• Valves can also be Supplied upto 180 C Working Temperatures with Special Design, Subject to Working Pressure Imitations.
• Combination of Excellent Design Features of Reputed Overseas Valve Brands
• Rigid and Sturdy Design with Minimum Loss of Head Across the Valve
• Perfect Interchangeability of Components Assured Parallelism Between Side Flanges
• Assured Equal Taper Between Wedge Faces
• Perfect Machining and Pressing of Body and Wedge Rings
• Excellent Finish on Spindle Threads Resulting in low Friction and Smooth Operation of Valves
• Long Service Life and Leak-Tightness Even After Thousands of Open / Close Cycles

Accessories (Optional) :

• Position Indicator
• By-pass Arrangement (200 NB and above sizes)
• Repacking (Back Seat) Arrangement
• Spur / Bevel / Worm Gear Arrangement (200 NB and above sizes)
• Thrust Bearing Arrangement (200 NB and above sizes)
• Channel and Shoe Arrangement ( Renewable )(300 NB and above sizes)
• Locking Arrangement
• Extension Shafting and Head Stock
• Electric Actuator
• Drain Plug
• Chain and Chain Wheel Arrangement