Emerson DeltaV KJ2003X1-BA2

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Emerson  DeltaV KJ2003X1-BA2 IO module In Stock

A weight loaded vent valve normally uses a soft resilient film material, 

such as PTFE , to provide the seal between the pallet and the nozzle. 

This helps to prevent sticking between these components. When 

properly maintained, this film seat design will provide an acceptable seal 

up to 75% of the valve’s set pressure. API 2000 and ISO 28300 provides 

the acceptance criteria for seat tightness at 75% of the set pressure. 

This allowable leakage can range from 0.5 SCFH (0.014 nm3

/hr) of air 

for 6 inch (150 mm) and smaller valves to 5 SCFH (0.142 nm3

/hr) of air 

for valve sizes up to 12 inches (300 mm). Many of these valves with the 

PTFE film seal are designed to provide a maximum leak rate of 1 SCFH 

(0.028 nm3

/hr) of air at 90% of the set pressure. 

The storage tanks that are being protected by these devices are 

oftentimes designed to hold large volumes of fluids and thus can 

require a pressure or vacuum relieving device which needs to be able 

to deliver high venting capacities. Therefore, the size of these devices 

can be as big as 12” (300 mm) for their tank connection size. Since the 

force of the weights keeping the seat or pallet closed must be higher 

than the tank pressure multiplied by the exposed seat area, there are 

physical limitations to the maximum set pressure that can be provided. 

for example, the 12” (300 mm) weighted pallet valve may have a seat 

or nozzle area of approximately 90 in2

 (581 cm2

) that is exposed to the 

process.

Product details:

Emerson  DeltaV KJ2003X1-BA2 IO module

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