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Gas Ball Valve — Manual Ball Valves by R.K. Instruments & Controls
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Manual Ball Valves

Gas Ball Valve

Size Range: 1/4" to 4" (DN8 to DN100)
TypeFull Bore Manual Ball Valve, Lever Operated
ApplicationManual isolation valve for gas lines & gas trains
End ConnectionsFemale BSP Threaded (both ends)
Body MaterialNickel-plated Brass (CW617N)
Ball MaterialChrome-plated Brass (CW614N / CW617N)
Seat MaterialPTFE
SealingNBR + Viton® O-rings
LeverVarnished Steel (1/4"–2") / Aluminium (2½"–4")
Gas Working Pressure5 bar (1/4"–2") up to 18 bar (2½"–4") — see table

A lever-operated, full bore brass ball valve supplied by R.K. Instruments & Controls for manually isolating gas lines and gas trains. The nickel-plated brass (CW617N) body houses a chrome-plated brass ball on a PTFE seat, sealed with NBR and Viton® O-rings, giving reliable shut-off across a wide temperature range. Female BSP threaded both ends, available across the full 1/4" to 4" (DN8 to DN100) size range — see the size, gas pressure rating and materials-of-construction tables below for the exact specification at each size.

Technical Data

Size range, gas pressure rating & materials of construction.

Size & Gas Working Pressure

SizeGas Working Pressure
1/4" (DN 8)5 bar / 72.5 psi
3/8" (DN 10)5 bar / 72.5 psi
1/2" (DN 15)5 bar / 72.5 psi
3/4" (DN 20)5 bar / 72.5 psi
1" (DN 25)5 bar / 72.5 psi
1"1/4 (DN 32)5 bar / 72.5 psi
1"1/2 (DN 40)5 bar / 72.5 psi
2" (DN 50)5 bar / 72.5 psi
2"1/2 (DN 65)18 bar / 261 psi
3" (DN 80)16 bar / 232 psi
4" (DN 100)14 bar / 203 psi

Materials of Construction

Pos.DescriptionN.Material
1Female end adapter1Nickel-plated brass CW617N
2Seat2PTFE
3Ball1Chrome-plated brass CW614N (1/4"–3/8") · CW617N (1/2"–4")
4Stem1Brass CW614N
5O-ring1NBR
6O-ring1Viton®
7Body1Nickel-plated brass CW617N
8Lever1Varnished steel P04 (1/4"–2") · Aluminium (2"1/2–4")
9Screw1Zinc-plated steel C4C (1/4"–2") · Zinc-plated CB4 FF/C34 (2"1/2–4")
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