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SPRING LOADED BACK PRESSURE VALVE
Table 2-1: Operating conditions for the control valve
(continued)
Condition type
Description
Materials of construction
Main valve body: Steel, ASTM-A352 Gr. LCC
Main valve cylinder:
•
NPS 2-4: 17-4 PH
Main valve piston: Stainless steel (standard)
Seat ring:
•
Class 150 and 300:
—
NPS 2-4: Stainless steel
•
Class 600: Stainless steel
O-Rings:
•
Standard: Viton
®
•
For other material contact the factory
External hook up:
•
Class 150 and 300:
—
NPS 2-4: Carbon steel/Stainless steel 10 mm (0.375")
•
Class 600:
—
NPS 2-4: Stainless steel 13 mm (0.5")
Other internal parts: Stainless steel
2.1.1
Design considerations
Some conditions to consider:
•
Service operating pressure
•
Service testing pressures
•
Service process temperature and ambient site temperatures
•
Chemical composition and toxicity of fluid in operating conditions
•
Traffic, wind and earthquake at loading site
•
Adverse force or stress caused by inadequate supports, attachments, piping, etc.
•
Corrosion, erosion, fatigue, etc.
•
Decomposition of unstable fluids in operating and test conditions
•
Possible damage from external fire
•
Mass fluid in process and test conditions
WARNING
FUNCTIONAL AND ENVIRONMENTAL HAZARD
Evaluate the functional and environmental conditions prior to installing a control valve.
Install the control valve in a well-designed piping system.
Failure to comply may result in death or serious injury from pipe failure.
Operating conditions and specifications
User manual
August 2019
DAN-20064957
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707 Spring Loaded Back Pressure Valve
