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Manufacturing ISO-9001 Ce
  
GATE AND SEAT ASSEMBLY, TYPE "F", MODEL "C", GATE VALVE 
 
Manufactured per API-6A, PSL-3. All H2S service parts conform to the latest NACE specifications.
 
Petrotrim Services provides FC trim replacement.
 
Valve Trim which falls under the guidelines of API-6A can be 
made to PSL-3.
 
Petrotrim Services is especially experienced in the manufacture of low pressure as well as high pressure.
 
Gate Valve components as mentioned for different trim service applications.
 
We also manufacture valve components to meet your specific requirements. 
 

Modified Acme stem threads allow the one-piece gate to float and effect a positive downstream seal.

 

17-4ph HH1150 stems are not acceptable for sour service above

0.5 psia of H2S corrosion resistant alloys per NACE standards are recommended.

  

Gate material DD trim: 4130 75k Colmonoy #5

 

EE trim: 410 SS Tungsten Carbide

 

Other materials such as Inconel, per request.

 

Bi-directional sealing capabilities

Petrotrim Services provides the "NEW" style Body Bushing.
 
Some other companies provide the "OLD" style Body Bushing.
 
Below is the difference between the two different styles, NEW vs. OLD.
 
The new Body Bushing is designed to overcome the following problems.
 
1) Eliminate pressure trapping in the valve cavity when the gate is  either fully open or closed.
 
2) Eliminate the tendency for the Seat Ring and Body Bushing to seal on the pressure side of the gate. (Upstream sealing). This effect increases the force to move the gate.
 
 In most cases the Teflon Seal Ring is the same one used on the Stellite Seat Ring.