What is a 3/8" ball valve with pneumatic actuator used for?

A 3/8 inch pneumatic actuated ball valve is used for automated on/off control in hydraulic test systems, pneumatic circuits, process control, and small-bore pipeline applications. With a 12mm line size compatibility, it is ideal for hydraulic oil pressure leak test benches, automated testing machinery, instrumentation panels, and process control skids requiring fast, reliable switching with fail-safe capability.

What is the difference between 1/4" and 3/8" actuated ball valves?

The primary difference is the bore size and flow capacity. A 3/8 inch (DN10) ball valve has a larger bore than 1/4 inch (DN8), providing approximately 50% more flow capacity. The 3/8 inch size is compatible with 12mm OD tubing while 1/4 inch suits 10mm lines. Both share the same actuator specifications, fail-safe function, and position feedback features. Choose 3/8 inch when your line size is 12mm or when higher flow rates are needed.

Can this 3/8" valve handle SAE 10 hydraulic oil at 100 bar?

Yes, when specified with forged stainless steel (SS316/SS304) or carbon steel (A105) body, this 3/8 inch ball valve is rated for 100 bar (1450 PSI) working pressure. The RPTFE (Reinforced PTFE) seat ensures API 598 zero leakage with SAE 10 hydraulic oil at temperatures up to 90°C. The seat material resists extrusion under high differential pressure.

What air pressure is needed to operate the pneumatic actuator?

The dual scotch yoke pneumatic actuator requires 80 PSI (5.5 bar) supply air pressure. It operates reliably with standard 5 bar plant air supply. The double acting function uses air pressure for both opening and closing, while the spring return ensures fail-to-close on air loss. A 24VDC solenoid valve is included for electrical control.

Does Supreme Valves supply this valve with complete documentation?

Yes, Supreme Valves India provides complete documentation including: Material Test Certificates (MTC/EN 10204 3.1), Hydrostatic Test Certificate (API 598), Dimensional Inspection Report, Actuator test certificate, Solenoid valve data sheet, Proximity switch wiring diagram, and GA drawing. Third-party inspection (TPI) can be arranged through Bureau Veritas, TUV, or Lloyds if required.

3/8 inch Ball Valve with Pneumatic Actuator FNPT - Supreme Valves India

Pneumatic Actuated Ball Valve

3/8" 2-Way Ball Valve with Pneumatic Actuator & Position Feedback

Name: 3/8" 2-Way Ball Valve with Pneumatic Actuator & Position Feedback FNPT
Brand: Supreme Valves India
SKU: SV-BV-038-PA-FNPT-DA-FC
Price: 9500 INR
Availability: InStock
Rating: 4.9 (42 reviews)

3/8 inch pneumatic actuated ball valve with dual scotch yoke actuator, double acting with fail-to-close safety. FNPT connection, RPTFE seat, API 598 zero leakage. Includes 2x solid-state 24VDC proximity switches for open/closed position feedback. Compatible with 12mm OD tubing.

Quick Specifications

Size: 3/8" (DN10)

Connection: FNPT

Seat: RPTFE

Actuator: Dual Scotch Yoke

Function: Double Acting

Fail Safe: Fail to Closed

Air Pressure: 80 PSI (5.5 bar)

Feedback: 2x 24VDC Prox.

Line Size: 12mm OD

Leakage: API 598 Zero

Key Applications

Hydraulic Oil Leak Test 12mm Line Systems Automated Test Benches Process Automation API 598 Zero Leakage

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Detailed Technical Specifications

Product Type	2-Way Ball Valve with Pneumatic Actuator Assembly
Valve Size	3/8" (DN10 / 10mm bore)
Port Type	Full Bore / Standard Port
Connection Type	FNPT (Female National Pipe Thread)
Seat & Seal Material	RPTFE (Reinforced PTFE) - Chemical resistant, high-temperature rated
Body Material	SS316 / SS304 / Carbon Steel (A105) - as per application
Ball Material	SS316 Chrome Plated / SS304
Stem Material	SS316 / SS304
Actuator Specifications
Actuator Type	P Series Dual Scotch Yoke Pneumatic Actuator
Function	Double Acting (DA) with Spring Return
Fail Safe Position	Fail to CLOSED - Valve closes on air/power loss
Supply Air Pressure	80 PSI (5.5 bar) — operates reliably at 5 bar plant air
Solenoid Valve	24VDC, 5/2 way or 5/3 way (included)
Position Feedback
Proximity Switches	2x Solid State Proximity Switches (1 for Open, 1 for Closed)
Switch Voltage	24VDC
Switch Output	NPN / PNP (as per requirement)
Operating Conditions
Max Working Pressure	100 bar (1450 PSI / 10 MPa)
Max Temperature	90°C (194°F)
Media	Hydraulic Oil (SAE 10), Compressed Air, Water, Steam, Gas
Testing Standard	API 598 — Zero Leakage
Line Size Compatibility	12mm OD tube (with suitable adapters)

Application: Hydraulic Oil Pressure Leak Test

12mm Hydraulic Line

3/8" bore size is ideally suited for 12mm OD hydraulic tubing systems. RPTFE seat provides excellent compatibility with SAE 10 hydraulic oil at 100 bar and 90°C with API 598 zero leakage.

Fail-Safe Operation

Double acting actuator with spring return ensures the valve fails to CLOSED position on air supply loss. Critical safety feature for high-pressure hydraulic test systems to prevent uncontrolled oil release.

PLC Integration

Dual solid-state proximity switches (24VDC) confirm valve open/closed position. Direct integration with Siemens, Allen-Bradley, Mitsubishi, or any industrial PLC. NPN or PNP output available.

Higher Flow Capacity

Compared to the 1/4" variant, the 3/8" provides approximately 50% more flow capacity — ideal when your test cycle requires faster filling/draining or higher flow rates through 12mm lines.

Test Pressure Requirements (API 598)

Test Type	Pressure	Medium	Standard
Hydrostatic Body Test	1.5x WP (150 bar)	Water	API 598
Hydrostatic Seat Test	1.1x WP (110 bar)	Water	API 598
Pneumatic Seat Test	6 bar (87 PSI)	Air / Nitrogen	API 598
Leakage Acceptance	ZERO LEAKAGE — No visible leakage permitted

Complete Assembly Includes

Ball Valve

3/8" 2-way, FNPT, RPTFE seat, full bore

Pneumatic Actuator

Dual scotch yoke, DA + spring return FC

Solenoid Valve

24VDC, 5/2 or 5/3 way directional

Position Feedback

2x solid-state proximity switches, 24VDC

Mounting Kit

Bracket, coupling, fasteners as per ISO 5211

Available in Other Sizes

1/4" (DN8)

Same specs — 10mm line size

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3/8" (DN10)

Current page — 12mm line size

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1/2" (DN15)

Same specs — larger flow capacity