Secure Ordering: +1 (757) 528-8028
Parts Catalog » Hardware » Contact Us » Quote »
NationalStockNumber.info
NationalStockNumber.INFO

Worldwide distributor of NSN parts and consumables located in the USA.

Safety Relief Valve

Model / MPN: 631B-2-3/4-1 | NSN: 4820-00-137-1835
ITAR Registered seal

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

Product Details
NATO Stock Number
4820-00-137-1835
Sold in multiples of
1 EA
DEMIL
NO
Pipe Size Accommodated
0.750 inches 1st end
Pipe Size Accommodated
0.750 inches 2nd end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Bonnet Type
Inside spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Maximum Operating Temp
225.0 degrees fahrenheit single response
Connection Style
G46b plain (pipe) 2nd end
Connection Style
G9 plain, optional en (pipe) 1st end
Connection Style
Plain (pipe) 2nd end
Connection Style
Plain, optional en (pipe) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded external pipe 2nd end
Connection Type
Threaded internal pipe 1st end
Adjustable Pressure Range
+10.0/+50.0 pounds per square inch
Adjustable Pressure Range
+10.0 to 50.0 pounds per square inch
Maximum Operating Pressure
50.0 pounds per square inch single response
Thread Size
0.750 inches 1st end
Thread Size
0.750 inches 2nd end
Opening Pressure Setting
35.0 pounds per square inch
Material
Copper alloy seat
Material
Copper alloy body
Material
Steel comp 303 flow control device
Material Specification
Fedstd66, aisi303/sae30303 federal standard single material response flow control device
Media For Which Designed
Water-oil-gas single response
Style Designator
Angle
Thread Series Designator
Anpt 1st end
Thread Series Designator
Anpt 2nd end
631B2 Series Parts

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Qty:
Email Address:
Phone Number:
Your name:
Company:
Privacy    Terms

Certified Quality Assurance  Quality check icon

  •   ISO 9001:2015 + AS9120B
  •   Counterfeit Parts Prevention
  •   100% Product Inspections
  •   7 Year Record Retention
  •   On Time Delivery
  •   HAZMAT Certified
  •   Worldwide Shipping
631B-2-3/4-1 Cross Reference
  • 631B2-3/4-1