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Design construction:
ASME B16.34 - BS 5352
Testing according to API 598
Marking MSS SP25
Spring on request only
Spiral-wound gasket
Integral backseat
Socket Weld Ends to ASME B16.11
Screw Ends (NPT) to ASME B1.20.1
Butt Welding Ends to ASME B16.25



Ratings:

    - carbon steel class 800
      1975 psig @ 100°F
      138 bar + 38°C

    - carbon steel class 1500
      3705 psig @ 100°F
      255 bar + 38°C

Check-Valves--Bolted-Bonnet--Full---Standard-Port_img
Check Valves-Bolted Bonnet Full_Standard Port - Dimensions
Unit of Measure
1 

Item #

Size

Connection Type

Material

Class

Weight

1/2" HL-41-T PISTON N/A 1/2 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 2.75 lb
1/2" HL-41-T PISTON SL N/A 1/2 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 2.75 lb
3/4" HL-41-SW PISTON N/A 3/4 N/A Socket Weld N/A A 105, Trim F6/HF N/A 800 N/A 3.5 lb
3/4" HL-41-T PISTON N/A 3/4 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 3.5 lb
3/4" HL-41-T PISTON SL N/A 3/4 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 3.5 lb
3/4" HL-51-T BALL SL N/A 3/4 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 3.5 lb
3/4" HL-61-T SWING N/A 3/4 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 3.5 lb
1" HL-41-SW PISTON N/A 1 N/A Socket Weld N/A A 105, Trim F6/HF N/A 800 N/A 6.25 lb
1" HL-41-T PISTON N/A 1 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 6.25 lb
1" HL-41-T PISTON SL N/A 1 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 6.25 lb
1" HL-61-T SWING N/A 1 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 6.25 lb
2" HL-41-T PISTON SL N/A 2 N/A Threaded N/A A 105, Trim F6/HF N/A 800 N/A 19.75 lb
Unit of Measure
1