Prds Valve

Prds valve bottom injection (upto & including 1½" nb) series 270
prds valve bottom injection (2" nb and above) series 280
prds valve top injection (2" nb and above) series 290
•rangability 40:1 for both steam and water
•water injection in vena contract a zone
•high turbulence in expanding steam is ideal for optimum evaporation of spray water
•a rough control of water i.e. Instantaneous change in water flow corresponding to steam flow is possible through the stroke of the plug.
•the final temperature control is realised through the water injection valve
•multistage trim (2-5 steps) design ensures subcritical pressure reduction from 0-100% capacity for all stages. The subcritical pressure reduction is an important quality feature.
•water-steam fog absorbs noise, resulting reduction in noise level upto 6db
size
25-300 nb
pressure rating
class 150-900
body material
cast carbon steel a216 wcb, wcc
cast alloy steel a217 wc6, wc9
other materials as per specification on request
trim material
aisi 410, 420, 431
din 1.4122, 1.4922
sae 51422
other materials as per specification on request
end connection
flanged ends (normally class 150-600)
butt weld ends (normally class 900)