I. Overview 
 Role and purposes: regulation and control of the main valve outlet pressure, the main valve outlet pressure does not change due to changes in inlet pressure, outlet flow is not due to changes in the main valve to change its outlet pressure. Can be used for living water, fire systems and industrial water supply system. 
 Pressure rating: PNIO, PNl 6, PN25 diaphragm: DN20 ~ 450 
 Piston: DN500 ~ 750, medium temperature: O ~ 80 ℃. 

 Second, the main dimensions: 

 Nominal diameter size (mm) 
 DN (mm) L W H 
 20150245195 
 25160254208 
 32180263222 
 40200272237 
 50203282254 
 65216292272 
 80241310282 
 100270330303 
 125300358344 
 150330385385 
 200400438437 
 250480490532 
 300550550600 
 350622617677 
 400685693764 
 450750778862 
 500811873972 
 6009359801096