Manual 6″ Sliding Valve (Replaceable O-ring Seat) – 6″ Threaded Pipe x TTMA Flange

The Betts replaceable o-ring sliding valve is a manually operated external stop valve that provides a quick open or close function. The replaceable o-rings provide a leak tight seal and protect the disc from scratches due to metal-to-metal contact. The PTFE encapsulated o-rings and 316 stainless discs offer premium corrosion resistance and the adjustable packing nut with woven PTFE infused packing allows for easy stem adjustments.

Parts List

Product Details

Assembly NumberFlange Dims.DimensionsWt.
SV816****OD: 9.38" [238 mm]
BC: 8.13" [206 mm]
Holes: 12 - .44" [12 - 11 mm]
Thick.: .135" [3.5 mm]
A: 11.69" [297 mm]
B: CLOSE 16.69 " [424 mm]
OPEN 31.56" [802 mm]
C: N/A
D: 5.13" [130 mm]
E: 4.03" [102 mm]
30.0 lb. [13.6 kg]
**** Last four letters of part number designates material of construction as shown below:

Example Assembly


(Manual 3″ Sliding Valve (Replaceable O-ring Seat) – 3″ 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

A heat tube option is available for 4″ and 6″ size by adding suffix “J” to 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