JIS Butterfly Valve –
Shipbuilding and Shipyard Solutions from Flowtorq

Name: JIS Butterfly Valves
Brand: Flowtorq
SKU: BFV
Rating: 7 (29 reviews)

Premium Quality JIS Butterfly Valves as Japanese Industrial Standards

A JIS butterfly valve is manufactured and tested in accordance with Japanese Industrial Standards (primarily JIS B 2032 for wafer/lug type and JIS B 2064 for flanged type butterfly valves), ensuring precise dimensions, reliable performance, and compatibility with JIS flange systems (JIS 5K, 10K, 16K, 20K). These quarter-turn valves provide excellent flow isolation, low pressure drop, compact design, and cost-effective operation in pipelines handling water, air, steam, oils, and non-aggressive chemicals.

Flowtorq is a leading manufacturer and supplier of premium JIS butterfly valves, producing valves that fully conform to JIS specifications while offering enhanced features, material options, and actuation compatibility for demanding industrial applications across Japan, South Korea, Taiwan, Southeast Asia, and global projects requiring JIS-compliant equipment.

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Key Features, Specifications & Technical Nuances of JIS Butterfly Valves

Pressure Ratings (JIS K Classes)

JIS 5K: ~0.5 MPa (72.5 psi) at ambient
JIS 10K: ~1.0 MPa (145 psi) at ambient – most common rating
JIS 16K: ~1.6 MPa (232 psi)
JIS 20K: ~2.0 MPa (290 psi) for higher-pressure services Pressure-temperature derating applies per JIS B 2032/B 2064 tables (e.g., ductile iron with EPDM seats typically limited to ~120°C).

Body & Connection Styles

Wafer type (shortest face-to-face, fits between JIS flanges)
Lug type (tapped lugs for dead-end service and easy removal)
Flanged type (integral raised-face flanges per JIS B 2212/B 2213)

Materials & Construction

Body: Ductile cast iron (FCD-S or FCD450), cast iron (FC200), carbon steel (SCS13A/SCS14A equivalents), stainless steel (SCS13/SCS14)
Disc: Ductile iron (nickel-plated or nylon-coated), 304/316 stainless steel, aluminum bronze (for seawater)
Stem: 410/420/316 stainless steel (anti-blowout design)
Seat: EPDM (water/general), NBR (oils), Viton/FKM (chemicals/heat), Silicone (high/low temp), PTFE/RPTFE (corrosive/high-temp)

Seating Performance

Bubble-tight bidirectional shutoff (zero visible leakage per JIS leak test)
Concentric (rubber-lined) or double-eccentric (high-performance) disc geometry to minimize seat wear and operating torque

Size Range

DN50 (2") to DN1200 (48") and larger in flanged versions

Face-to-Face Dimensions

Strictly per API 609, BS 5155, JIS B 2032 (wafer/lug) or JIS B 2064 (flanged) for drop-in replacement

Actuation Compatibility

ISO 5211 mounting pad standard
Manual lever, worm gearbox, pneumatic (double-acting or spring-return), electric (on/off or modulating)

Testing & Compliance

API 598, EN 1092 PN10, PN16, JIS B 2032 / B 2064 pressure & leakage testing

Optional: JIS G 5502 material certification, third-party inspection (SGS, Bureau Veritas), WRAS/ACS equivalents for potable water
Nuances: JIS 10K is the most widely specified rating in Japanese industrial plants, equivalent in pressure capability to PN10/ANSI Class 150 but with different bolt patterns and face-to-face lengths. Double-eccentric designs significantly reduce torque and extend seat life in throttling or frequent cycling applications.

SHIPYARDS

Proven and approved by leading shipbuilding and ship repair companies. Used by leading Shipyards.

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Primary Applications & System Implications

Water Supply & Treatment — Municipal distribution, desalination plants, irrigation, fire protection systems (common in Japanese and Korean infrastructure projects)
HVAC & Building Services — Chilled/hot water, district cooling/heating networks in commercial complexes and factories
Industrial Process — General plant utilities, compressed air, cooling water, non-corrosive chemicals in manufacturing (automotive, electronics, steel, petrochemical)
Marine & Shipbuilding — Ballast, seawater cooling, bilge systems (especially with aluminum bronze construction)
Power & Utility — Cooling water circuits, low-pressure steam condensate return

Implications: Strict adherence to JIS dimensions ensures seamless integration into existing Japanese-designed piping systems without adapters or modifications. Bubble-tight shutoff reduces media loss and energy waste. The availability of JIS 5K–20K ratings allows precise matching to actual system pressure, avoiding over-specification and unnecessary cost.

Edge cases: For seawater or brackish water, select aluminum bronze body/disc + EPDM/Viton seats; for steam service up to ~150°C, upgrade to high-temperature EPDM or PTFE seats with extended bonnet; use lug style for dead-end or frequent maintenance access.

Why Flowtorq is Your Preferred JIS Butterfly Valve Manufacturer & Supplier

Flowtorq manufactures JIS butterfly valves with full material traceability, 100% pressure and seat leakage testing per JIS standards, fusion-bonded epoxy or specialized coatings, replaceable seats, and complete actuated valve packages (pneumatic/electric with solenoids, positioners, limit switches, feedback).

We offer customization for:

Specific JIS K ratings (5K/10K/16K/20K)
Exotic materials (duplex, Hastelloy)
Special approvals (e.g., Japanese ship classification societies)
Fast delivery to Asia-Pacific markets

Whether supplying to Japanese OEMs, Korean shipyards, Southeast Asian EPC contractors, or international projects requiring JIS compliance, Flowtorq delivers reliable, high-performance JIS butterfly valves at competitive prices with excellent after-sales support.

Contact Flowtorq today – your trusted manufacturer and supplier – for detailed specifications, CAD drawings, torque calculations, and high-quality JIS butterfly valves tailored to your exact requirements.

Flowtorq – Leading Manufacturer & Supplier of JIS Butterfly Valves