Pneumatic Operated 4″ Sliding Valve (Replaceable O-ring Seat) – 4″ Threaded Pipe x ANSI Flange

  • Air Open / Spring Close
  • Teflon Encapsulated Seats
  • TTMA, ANSI, or Sump Flange Drilling

The Betts Pneumatic sliding valve meets requirements for an external self-closing stop valve. Valve does not contain a shear section. The cargo tank must protect the valve by providing suitable protection as specified in 49 CFR 178.345-8. The cylinder is air open with spring close and requires 90 psi line pressure to fully open. The PTFE encapsulated o-rings provide a positive seal for pressure or vacuum service and standard 316 stainless steel discs offer premium corrosion resistance. The adjustable packing nut with woven PTFE infused packing allows for easy stem adjustments. The air cylinder max working temperature is 250° F (121° C). A fusible plug, set to melt above 212° F (100° C), is installed in air cylinder to dump air pressure in case of fire.

Parts List

Product Details

Assembly No.DescriptionABCDEWt.
SV764****4" Threaded Pipe x ANSI Flange26.88" [683 mm]31.88" [810 mm]N/A2.63" [67 mm]3.44" [87 mm]22.0 lb. [10.0 kg]
**** Last four letters of part number designates material of construction as shown below:

Example Assembly


(Pneumatic Operated 4″ Sliding Valve (Replaceable O-ring Seat) – 4″ Threaded Pipe x ANSI Flange)
Disc Materials
MSTS = Steel Body with 316 Stainless Stem & Gates
SSTS = 316 Stainless Body, Stem & Gates
Flange bolt pattern per TTMA recommendations and grooved outlets per MIL-C-10387B.

** MAWP certified for new valves only. Seat/disc damage or wear may reduce sealable MAWP.

Repair Kits and Accessories

Teflon Accordion Packing

Additional Options

Use suffix “008” for valve less actuator. A heat tube option is available for 4″ and 6″ sizes by adding suffix “J” to end of part number. (Heat tube MAWP = 150 psi)

Body MaterialValve MAWP**Min. Burst PressureTemp. Range
Steel or Stainless50 psi [3.4 bar]200 psi [13.8 bar]-40°F to 400°F [-40°C to 204°C]
NOTE: Valve should NEVER be heated with flame

Engineering Bulletins

EB-1-15: Important Notification for Gate/Sliding Valves Used in Hot Service Application