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DESCRIPTION

The INVALCO Series 510 Valve can be used for maintaining back pressure on vent lines from separators, treaters, dehydrators, compressor stations, gas gathering systems, etc.

Specifications

Body and Cover	Ductile A-395
End Connections	2”, 3”, 4” and 6” ANSI 150# RF Flanges
Diaphragm Case	Steel, 26 sq. in. or 65 sq. in.*
Diaphragm	Nylon reinforced Buna N
Temperature Limits	-20°F to 250°F**
Containment Pressure	100 psi **
Packing	Non-lubricated Buna-N
Stem	303 Stainless Steel****
Cages and Guides	304 Stainless Steel
Seats	2”, 3”, and 4”...304 Stainless Steel 6”...303 Stainless Steel****
Valve Plugs	2”, 3”, and 4” Replaceable Buna**** 6” Viton O-Ring
Seat-to-Body Seals	O-Ring
Spring Ranges	0-100 psi (see chart on page 2)
Pressure Increase Required From Full Closed to Full Open Spring Range 0-25 psi 20-40 psi 40-60 psi 60-100 psi	Increase 2.7 psi 4.0 psi 9.0 psi 10.5 psi

FEATURES

Ductile Iron Body - Meets most application requirements.
Soft Plug - Allows for positive shut-off.
Double-Port Design - Allows for decreased flow.
Nace Adaptable - Can be modified for use in sour service.

SETTINGS

Any spring combination may be set to open at less than 5 psi working pressure, but, because the heavier springs are less sensitive, it is recommended that valves be selected to suit the pressure range required. Valve will be factory set to mid-point of range specified.

ADDITIONAL INFORMATION

General Notes
1. Refer to valve engineering section for valve sizing charts.
2. Cg-Cv is for fully opened valve.
3. Part numbers valid only if valve desired is exactly as described.

* 6” Only
26 sq. in. Topworks for 40-60 and 60-100 Spring Range.
65 sq. in. Topworks for 0-25 and 20-40 Spring Range.
2”, 3” and 4” Valves
26 sq. in. Topworks.
** Containment pressure is maximum working pressure and is limited by the diaphragm case. However, pressures above the maximum spring setting are uncontrolled and the back pressure valve will be fully open.
*** Limited by elastomers.
**** Consult factory for optional trim.

Note to Dimensions: Dimensions – Inches to the nearest tenth (millimeters to the nearest whole mm), each independently dimensioned from respective engineering drawings.

*Clearance to remove adjusting screw.
Cv-Cg values for full open valve.
Part numbers valid only if valve is exactly as described.