RS Components
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RS PRO Process Ball Valve 1/4in

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9 In stock for delivery within 1 working day(s)
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RS Stock No.:
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unitsPer unit
1 - 9$17.81
10 - 29$17.14
30 +$16.26

S.93 EN331 Downstream Exhaust Brass Ball Valve - 1/4 Turn, Lockable handle

Featuring patented tamper-proof lockable handle that has no equal in the market.
S.93 range exhausts automatically and continuously downstream air pressure as soon as turned in the closed position.
Valve is lockable in the closed position only, according to Part. 1910.147 safety OSHA (USA) requirements allowing safe maintenance of the air-supplied equipment; when valve is open, one simple 90゚ turn of the handle shuts flow immediately.

Application : Air, Industry
Operating Temperature : -10°C (+15°F) / +100°C (+210°F)
Operating pressure : PN14 (200 PSI) up to 2’’, non-shock cold working pressure
Threads : EN 10226-1, ISO 228 parallel threads
Port : Full
Connections options : FxF, BSPP, BSPT
Stem Configuration : Blowout-proof nickel plated brass stem, with Pure PTFE adjustable packing gland and washer for lower torque and easy maintenance.
Ball seats : Glass filled pure PTFE self-lubricating, with flexible-lip design
Body : Full port to DIN 3357 for maximum flow
100% Made in Italy
Chrome plated brass ball for longer life
Silicone-free lubricant on all seals
Travel stops on body to avoid stress at stem
24h 100% seal test guaranteed
Dual sealing system allows valve to be operated in either direction making installation easier
No metal-to-metal moving parts
No maintenance ever required
Handle clearly shows ball position
Quality : Hot forged sand blasted, nickel plated brass body and cap sealed with Loctite or equivalent thread sealant; Finest brass according to EN 12165 and EN 12164 (formerly DIN 17660 and UNI 5705-65) specifications

Blowout-proof nickel plated brass stem
Pure PTFE adjustable packing gland and washer for lower torque and easy maintenance


14 Bar Kg/cm2 (200 PSI)
non-shock cold working pressure

Working Pressure:

Full port to DIN 3357 for maximum flow


Glass filled pure PTFE self-lubricating seats with flexible-lip design


10゚C (+15゚F) / +100゚C (+210゚F)

Operating Temperature:


Approvals apply to specific configurations only


GOST-R (Russia)
Expert Conclusion (Russia)
EAC Conforming (Russia)
RoHS Compliant


Freezing of the fluid in the installation may severely damage the valve

Ball Valve, Standard, Padlockable and Panel Mount

These nickel plated brass ball valves have seals designed to remove scale deposits with each operation. The polished brass ball is sealed on both sides by nylon ring seals that are supported by compensating nitrile ’O’ rings. This arrangement keeps the seal in contact with the ball, preventing leakage should seal wear occur. A single threaded insert forms part of the valve body, maintaining the required seal compression and allowing the valve to be disassembled easily for inspection.

Attachment TypeThreaded
Maximum Working Pressure14 bar
Body MaterialBrass
Ball MaterialChrome Plated Brass
Actuator IncludedYes
Seal MaterialPTFE
Thread Size1/4in