DANIEL V707 User Manual page 16

SPRING LOADED BACK PRESSURE VALVE
Operating conditions and specifications
August 2019
Table 2-1: Operating conditions for the control valve
2.1.1 Design considerations
Some conditions to consider:
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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.
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Condition type
Materials of construction
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
(continued)
Description
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
707 Spring Loaded Back Pressure Valve
User manual
DAN-20064957