316/316L Stainless Steel Ball Valves

Corrosion Resistance: Excellent resistance to pitting and crevice corrosion in chloride-containing environments, seawater, and aggressive chemical media, thanks to 2–3% molybdenum content.

Bidirectional Shut-Off: Full port design provides minimal pressure drop and reliable bubble-tight shut-off in both flow directions.

Low Operating Torque: Precision-machined ball and PTFE/RTFE seats provide smooth quarter-turn operation with low torque requirements.

Fire-Safe Design: Available with fire-safe certification (API 607/ISO 10497) for critical applications.

Multiple End Connections: Flanged (ASME B16.5), threaded (NPT/BSP), socket weld (SW), butt weld (BW), and wafer/lug type connections.

Anti-Static Device: Optional anti-static design to prevent static electricity accumulation across the valve.

Blow-Out Proof Stem: Stem design prevents accidental blow-out under pressure, ensuring operator safety.

Full Range of Types: Floating ball (1/2″–12″), trunnion mounted (2″–48″), three-piece (1/4″–6″), top entry, and V-port control ball valves.

Pressure Ratings: Available in Class 150, 300, 600, 900, 1500 (PN16 to PN260) and 1000/2000/3000/6000 WOG.

Temperature Range: Suitable for -196°C to 260°C (-320°F to 500°F) depending on seat material.

International Certifications: Valves can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with API 607, API 6D, ASME B16.34, and NACE MR0175 standards.

Pressure Ratings (WOG – Water, Oil, Gas at Ambient Temperature):

Material Selection: High-quality 316/316L stainless steel (CF8M cast or forged) from certified mills with certified chemical composition and traceability.

Casting/Forging: Valve body cast or forged to shape, then heat treated (solution annealing at 1040–1080°C followed by water quenching).

Machining: CNC lathes and machining centers produce precise dimensions – ball cavity, stem bore, flange faces, bolt holes, and seat pockets.

Ball Machining & Polishing: Ball is machined and polished to mirror finish (Ra ≤ 0.4μm) for bubble-tight shut-off.

Seat Machining: PTFE or RTFE seats machined to precise dimensions for proper sealing.

Stem Machining: Stem machined with anti-static spring grooves and blow-out proof shoulders.

Assembly: Ball, seats, stem, seals, and body assembled in clean environment.

Testing: Hydrostatic shell test, high-pressure seat test, low-pressure seat test (bubble test).

Marking: Laser engraved or stamped with size, pressure, material, heat number, and API/fire-safe markings.

Painting/Coating: External coating (epoxy or blue PTFE) for corrosion protection.

Manual Lever Handle: Standard for sizes up to 4″, with or without locking device.

Gear Operator: For sizes 4″ and above, or high-pressure valves requiring higher torque.

Pneumatic Actuator: Double acting or spring return (fail-safe).

Electric Actuator: On-off or modulating control with various voltages.

Hydraulic Actuator: For subsea or hazardous locations.

Pressure Testing: 100% hydrostatic shell test (1.5× rated pressure), high-pressure seat test (1.1× rated pressure), low-pressure air seat test (bubble test).

Material Verification: PMI (Positive Material Identification) for body, ball, and stem.

Dimensional Inspection: Face-to-face, flange dimensions, ball cavity, stem bore using calibrated instruments.

Leakage Testing: API 598 / ISO 5208 – zero detectable leakage for soft seat valves.

Fire-Safe Testing: API 607 / ISO 10497 (upon request).

NACE Compliance: MR0175 hardness testing (≤22 HRC for 316).

Third-Party Inspection: ABS, BV, DNV, LR, SGS, TUV on customer request.

Secondary Metal-to-Metal Seats: After PTFE seat burnout, secondary metal seats provide shut-off.

Graphite Stem Seals: Fire-resistant stem packing for emergency sealing.

Anti-Static Device: Spring-loaded plunger ensures electrical continuity between ball and body.

Blow-Out Proof Stem: Stem design prevents accidental ejection under pressure.

Chemical & Petrochemical: Acid transfer lines, reactor isolation, corrosion media handling, solvent systems.

Marine & Offshore: Seawater cooling systems, ballast water treatment, desalination plant valves (ABS/BV/DNV/LR certified).

Pharmaceutical & Biotech: Sanitary ball valves, sterile process lines, WFI systems.

Food & Beverage: Dairy processing, brewery systems, CIP lines, juice processing.

Oil & Gas: Pipeline block valves, compressor station isolation, wellhead valves (NACE MR0175).

Water Treatment: Reverse osmosis, filtration systems, distribution lines.

HVAC & Refrigeration: Chilled water, condenser water, refrigerant lines.

Power Generation: Cooling water, boiler feedwater, auxiliary systems.

Pulp & Paper: Bleach plant valves, chemical recovery, process lines.

Cryogenics: LNG, liquid oxygen, liquid nitrogen service (-196°C).

Small valves (≤2″): Individual poly bags in carton boxes.

Medium valves (2.5″–8″): Plywood cases with foam padding.

Large valves (≥10″): Wooden crates with protective wrapping and pallets.

End Protection: Flange protectors for flanged ends; plastic caps for threaded ends.

Womic Steel's Delivery Strengths:

Ready stock: 1/2″–6″ 316/316L ball valves in Class 150 threaded and flanged – dispatch within 24-48 hours.

Direct cooperation with global shipowners for competitive freight rates.

Professional loading by in-house teams.

Complete documentation including MTR, test reports, and certifications.

1. What is the difference between 316 and 316L ball valves?
316L has lower carbon (≤0.03% vs ≤0.08%), providing better resistance to intergranular corrosion after welding. For welded end valves or service in sensitizing temperature range, 316L is preferred.

2. What is WOG pressure rating?
WOG stands for Water, Oil, Gas – the maximum working pressure at ambient temperature. For 316 stainless steel ball valves, ratings range from 1000 psi to 6000 psi depending on valve design.

3. Are these valves suitable for sour service (H₂S)?
Yes, 316L ball valves with hardness control (≤22 HRC) can be NACE MR0175 / ISO 15156 compliant for sour service. Full documentation available.

4. What is the maximum temperature for PTFE seated valves?
PTFE seated valves are rated to 180°C (356°F). For higher temperatures, PEEK (260°C) or metal-seated (600°C) valves are available.

5. Do you provide fire-safe certified valves?
Yes, our 316/316L ball valves can be manufactured with API 607 / ISO 10497 fire-safe certification. Fire-safe test reports included.

6. What actuation options are available?
Manual lever, gear operator, pneumatic (double acting/spring return), electric (on-off/modulating), and hydraulic actuators.

7. What is the difference between full port and reduced port?
Full port ball valve has ball bore same as pipe ID, minimizing pressure drop. Reduced port has smaller ball bore, reducing cost and torque but increasing pressure drop.

Complete Product Range: Floating, trunnion, three-piece, top entry, V-port, multi-port – all types available.

Strict Quality Control: ISO 9001:2015, API 6D, PED 2014/68/EU certified.

Fire-Safe Certified: API 607 / ISO 10497 fire-safe testing available.

NACE MR0175 Compliant: Full documentation for sour service applications.

100% Pressure Tested: Hydrostatic shell and seat tests on every valve.

Full Traceability: Heat number stamped – traceable to raw material.

Flexible Customization: Special end connections, extended stem, locking device, actuation.

Global Delivery: Exported to over 50 countries.

Tel / WhatsApp:
Victor: +86 15575100681
Jack: +86 18390957568

Website: www.womicstainless.com
E‑mail: info@womicstainless.com

Contact Womic Steel today for a competitive quote on 316/316L stainless steel ball valves. We offer certified quality, API 607 fire-safe certification, NACE MR0175 compliance, fast production lead times, and reliable global delivery.

Stock Examples (Threaded 316/316L Ball Valves – 1000 WOG – Two-Piece):

Stock Examples (Flanged 316/316L Ball Valves – Class 150 – Floating Type):

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