Emerson DeltaV 1C31223G01

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Emerson  DeltaV 1C31223G01 IO module In Stock

Operation of the two ring valve is very similar to that of the single ring 

design. When inlet pressure exceeds the pressure exerted by the valve 

spring, the disc moves off the nozzle and the escaping steam builds 

the upward force via the nozzle ring that is directed to the disc face to 

minimize the spread between simmer and set pressure (see figure 4-9). 

The position of the nozzle ring determines the difference between 

simmer pressure and set pressure. As with the ASMe Section VIII safety 

valve design, the higher the nozzle ring position, the less simmer or 

leakage occurs prior to lifting the disc. 

As the lift continues, the steam starts to impinge on the guide ring as 

shown in figure 4-10 to provide even more lifting force so that adequate 

lift is achieved with 3% overpressure. The guide ring position determines 

the blowdown setting. The lower the guide ring position, the higher the 

opening force delivered by the flowing steam. This causes an increase 

in the blowdown.

In order to decrease the blowdown, the guide ring is 

raised. 

Recall that the requirement during provisional certification for a Section I 

safety valve is to demonstrate a blowdown of no more than 4%. This valve 

performance criteria, along with the minimal overpressure, necessitates 

the two ring trim design. 

Product details:

Emerson  DeltaV 1C31223G01 IO module

Contact information：

Contact person：Luna Chen

Email Address:：sales6@saulplc.com

WhatApp： +86 13358378970

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