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Find My Check Valve
The DFT® Basic-Check® Valve is a versatile all-purpose, non-slam valve that provides reliable, low-maintenance service for a wide range of liquids, steam and gases at various pressure/temperature combinations. The valve consists of a guard cage, spring, valve disc, retaining ring and seat. It can be combined with pipe fittings such as reducing couplings, drain elbows, etc. to form a complete check valve unit ideally suited for a broad range of pipeline applications or incorporated into machinery for OEM applications. The metal-to-metal sealing area of the Basic-Check® valve’s disc and seat is precision-lapped, providing very tight shutoff of gas, steam and liquid. If bubble-tight shutoff is required, optional resilient soft seats are available.

Standard Features:
  • 1/4" to 2 1/2" Line Size
  • 450 to 6000 CWP
  • Threaded Ends
  • Stainless Steel Construction
  • Spring-Assisted Silent Closing
  • Horizontal or Vertical Installation
  • Tight Shutoff - Lapped Disc & Seat
  • Easy Maintenance
Unit of Measure

Inventory

Inventory

Specifications

Series

 Basic-Check®

Size

 1.50 inDN 40

Line Size Inlet (FNPT) A

 1.50 in

Outside Thread (MNPT) B

 3.00 in

Style

 BSS
Cold Working Pressure1
700 psig48.3 barg

Working Steam Pressure

 420 psig

Friction Loss (Feet of Pipe)

 11

Friction Loss (Meter of Pipe)

 3.4
Valve Cracking Pressure2 0.15 psi0.01 bar4.2 in.water107 mm.water7.8 mmHg

Valve Cracking Pressure Tolerance

 ±10%

Approx. Net Weight Each

 3.75 lb1.7 kg

Temperature Rating

 -460 to 700 ºF-273.33 to 371.11 ºC

ENDS

 NPT (Threaded)

Cv

 57.4

Materials of Construction

Seat

 303 SS

Disc

 316 SS

Guard

 CF8M

Spring

 Inconel® X-750

Retaining Ring

 316 SS

Available Soft Seat Materials

Available Soft Seat Materials3 Buna-N (-70 to 250ºF) EPDM (-75 to 300ºF) TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 450ºF)

Codes and Standards

ANSI

 B1.20.1 B16.11

MSS

 SP-25

Features

N/A

  • 1/4" to 2 1/2" Line size
  • 450 to 6000 CWP
  • Threaded ends
  • Stainless Steel Construction
  • Spring-assisted silent closing
  • Horizontal or vertical installation
  • Tight shut-off - lapped disc & seat
  • Easy Maintenance
  • Versatile

Options

N/A

  • Inconel® 750 Spring
  • Soft seat

Application

N/A Autoclaves Boiler Feed & Discharge Chemical Lines Compressor Discharge Condensate Lines Cookers Cooling Towers Crude & Refined Product Lines Cryogenics Digester Evaporators Fly Ash System Generator Inlet & Discharge Hydraulic Lines Metering Pumps Mine Dewatering Nitrogen Purge Process Lines Pump Discharge Refrigeration Steam Lines Vacuum Breaker Water Lines Water Treatment

  • 1 Contingent on service ratings of matching pipe and fittings.
  • 2 Cracking pressure for vertical flow will be slightly different: upward flow, slightly higher; downward flow, slightly less.
    Not recommended for use on discharge of reciprocating compressors.
  • 3 Soft seats are not available for the Style BSE check Valve. Buna-N and Viton are not suitable for steam service.