Pinless Design: Key/square shaft connection eliminates pin loosening/breakage, ensures stability in high-frequency/vibration, reduces failures.
Bidirectional Sealing:Elastic seat + spherical disc seals bidirectionally (custom leakage class), blocks contamination/backflow.
2-Ear Wafer:Compact design with bolt self-alignment for fast, precise installation with minimal errors.
Premium Materials: MTC certificates + PMI testing ensure material authenticity and compliance.
Design and Manufacture: ASME B16.34; ASME VIII; API 609
Side Flange Standards: ANSI 125LB/150LB/300LB/600LB; ASME; AS-D/E; BS PN10/16; DIN PN10/16; EN PN6/10/16/25; GB PN6/10/16; GOST; HG/T PN6/10/16/25; JIS 5K/10K/16K
Top Flange (Actuator Mounting) : ISO 5211; GB 90°
Face-to-Face Dimension: ISO 5752; ASME B16.10; EN 588-1
Testing Standards: API 598; EN 12266-1; ISO 5208
Certifications: ISO 9001; CE; BV; API 609; API 598; EAC; SIL3；
Technical description
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Q&A
Specification of the Valve |
|
|---|---|
| Type of Connection | Wafer |
| Actuation | Worm Gear |
| Size |
1 1/2in~112in (DN40~DN2800+) |
| Pressure |
25bar~64bar (2.5mpa~6.4mpa) |
| Testing Pressure | 450psi |
| Medium | Water/Oil/Air |
| Medium Temperature | -40℃~250℃ |
Material of the Valve |
|
|---|---|
| Body | CF8/ CF8M/ CF3/ CF3M/ 2205/ 2507/ 1.4529/ 1.4406 |
| Disc | DI/ CF8/ CF8M/ CF3/ CF3M/ 2205/ 2507/ 1.4529/ HC276/ C95400/ C95800 |
| Stem | 45#/ SS410/ SS416/ SS420/ SS304/ SS316/ SS316L/ 17-4/ 2205/ 2507/ 1.4529/ K500/ CF8/ CF8M/ HC276 |
| Seat | EPDM/ NBR/ SIL/ FKM/ FPM/ VITON/ PTFE/ RPTFE/ HYPALON |
The following are the representative application industries of this valve. Since butterfly valves can be applied to almost all industries (as long as the temperature and pressure are in line), many industries have not been listed.
The butterfly valve with worm gear features a turbine drive that ensures safe and smooth operation of large-diameter valves in explosion-proof areas, with a self-locking function to prevent misoperation. Its wafer design significantly reduces installation space and weight, lowering pipeline support and installation costs.
Our high performance butterfly valve meets API 598 or GB/T 13927 Class D leakage rates at 6.4MPa pressure. In the governor oil system (high-frequency regulation) of a hydropower station, the JRVAL double eccentric butterfly valve’s maintenance cycle far exceeds that of the original valves.
The precision double eccentric butterfly valve design allows for rapid, frictionless separation or low-friction contact between the disc and soft seat during opening/closing. This effectively protects the seat, reduces wear, and maintains excellent sealing performance even in networks containing small amounts of sediment or scale.
JRVAL, as a high performance butterfly valve supplier, provides valve solutions for various vessels (e.g., cargo ships, oil tankers, LNG carriers, passenger ships, special engineering vessels). Product design and manufacturing processes are acceptable for inspection and certification by classification societies such as CCS, ABS, DNV, LR, BV, RINA, NK, KR.
The SS316L material used in the high performance wafer butterfly valve performs excellently when handling industrial wastewater containing chloride ions and acidic flue gases. For slurries with solid particles, hardened discs or wear-resistant seats are available. JRVAL valves have been operating stably in the flue gas purification system (FGD/SCR) of a waste-to-energy plant for over 6 years with minimal corrosion and wear.
The hp butterfly valve is made from food-grade stainless steel (typically SS316L), with highly polished internal and external surfaces (Ra≤0.8μm or better). Seats are made from food-grade EPDM/Silicone/PTFE materials compliant with FDA standards. The design features no dead corners, facilitating easy cleaning and sterilization (CIP/SIP).
The eccentric butterfly valve (upgradeable to triple offset for severe abrasion) ensures rapid disc disengagement from the seat during opening/closing. This reduces sealing surface friction and scraping, effectively prevents slurry particles from jamming the valve, and lowers operating torque
The SS316L in the worm gear operated butterfly valve maintains good toughness even at -196°C. Special modified PTFE seats can be used from -100°C to +200°C. JRVAL valves have been operating stably on the liquid supply lines of a large ammonia refrigeration cold storage (-35°C environment) for over 7 years with no leakage records.
The unique bi-directional sealing design of the double eccentric butterfly valve allows it to withstand forward pressure (e.g., RO inlet) up to 25 bar (2.5MPa) and reverse pressure (e.g., system backwash, preventing concentrate/chemical backflow) up to 10 bar (1.0MPa). This ensures stable RO system operation and prevents cross-contamination and equipment damage.
The high performance valve features an inherent fire-safe design (API 609) and an anti-blowout stem, ensuring operational safety under extreme conditions.
JRVAL, as a double eccentric butterfly valve supplier, can provide materials compliant with NACE MR0175 / ISO 15156 standards, suitable for sour service environments containing H₂S.
JRVAL's double offset high performance butterfly valve with a tungsten carbide coated disc can extend service life by 5-10 times compared to standard stainless steel discs under similar wear conditions. Stellite hardfaced discs can extend life by 3-5 times.
JRVAL’s optimized stem connection and support design for the high performance butterfly valve allows it to withstand continuous industrial vibrations, with some designs capable of handling vibration accelerations up to 2G.
The most significant advantage of the high performance wafer butterfly valve is its extremely short face-to-face dimension. For example, a JRVAL PN16 DN200 butterfly valve has a face-to-face length of approximately 60mm
JRVAL's cryogenic butterfly valve, featuring an eccentric butterfly valve design, achieves bubble-tight zero leakage (e.g., API 598 or ISO 5208 Rate A) at its design temperature. For helium leak tests, it can achieve ≤1x10⁻⁶ Pa·m³/s (per customer requirements).
JRVAL's double offset butterfly valve, with its EPDM seat and double eccentric structure, can achieve over 50,000 switching cycles in clean water media, with some optimized designs reaching over 100,000 cycles.
The JRVAL's butterfly valve eccentric type, due to its optimized disc movement path from the double eccentric structure, can reduce the probability of jamming and clogging by approximately 40-60% compared to concentric butterfly valves.
Mirror-polished (Ra≤0.2μm) high performance double offset butterfly valve meets SEMI F57 standards with zero deadleg design.
JRVAL, as one of the high performance butterfly valves manufacturers, can provide valves certified to API 609 or ISO 10497 fire tests, ensuring post-fire leakage meets standard requirements.
The precise flow regulation and near equal percentage flow characteristic of the JRVAL valve contribute to its excellent butterfly performance. Its adjustability ratio typically reaches 50:1 to 100:1, superior to concentric butterfly valves (usually 30:1), enabling finer temperature and flow control.
The JRVAL's worm gear type butterfly valve offers low fugitive emissions, capable of meeting ISO 15848-1 BH C03 level (leakage rate ≤50 ppmv CH₄ at 200°C, 20,000 cycles) or API 624 requirements.
Q: What operational advantages does the “pinless connection design” provide for gear operator applications? |
A: The shear pin-free construction (featuring keyway engagement or monolithic stem-disc integration) ensures rigid torque transmission without backlash, eliminating shear stress concentration points during actuation. This is particularly critical for large-diameter (DN≥300) or high-pressure classes (ASME 600#+) where worm gear operators require maximum torque integrity, effectively preventing failure modes caused by pin shearing or disengagement. |
Q: What seat materials are available? What service life can be expected with mildly abrasive media? |
A: Our material selection protocol evaluates:ASTM G65 dry sand abrasion resistance; ASTM D471 chemical compatibility; Temperature rating per ASTM D794 Standard options include: ▪Glass-filled PTFE (RPTFE) | 15% GF, PV limit 0.35 MPa·m/s; ▪PEEK (30% carbon reinforced) | Max 260°C, PV 1.2 MPa·m/s; ▪UHMWPE | For ≤80°C slurry services, 8x improved wear resistance vs. standard PE Typical L10 life expectancy ranges 50,000-100,000 cycles under moderate abrasion (Brinell hardness <200). Request our wear rate calculator for precise prediction. |
Q: What is the operating torque for gear operators? Can a DN300 valve be manually operated by single personnel? |
A: Our EN ISO 5211-compliant gearboxes achieve ≥92% mechanical efficiency with optimized reduction ratios (20:1 to 100:1 selectable). For DN300 Class 150 valves: ▪Breakaway torque: ≤350 N·m ▪Running torque: ≤220 N·m Standard 800mm diameter handwheel generates 640 N·m mechanical advantage, enabling single-person operation within 30 RPM. Torque charts available per MSS SP-108. |
Q: What is the product warranty period? How is after-sales service handled? |
A: Standard warranty coverage is 12 months from shipment or 18 months from installation commissioning, whichever occurs first. Our comprehensive service network provides: ▪24/7 technical support ▪Field troubleshooting ▪Critical spares inventory ▪On-site maintenance assistance with guaranteed response timelines. |
Q: Are relevant certifications available, such as SIL ratings or Special Equipment Manufacturing Licenses? |
A: Please specify required certifications. Selected product lines can be certified to meet: ▪ IEC 61508 SIL compliance ▪ ASME B16.34 pressure ratings ▪ API 609 performance standards ▪ TSG compliance for pressure piping components Our quality management system holds ISO 9001:2015 certification with PED 2014/68/EU compliance. |
The following are the representative application industries of this valve. Since butterfly valves can be applied to almost
all industries (as long as the temperature and pressure are in line), many industries have not been listed.
Petrochemical & Chemical
The butterfly valve with worm gear features a turbine drive that ensures safe and smooth operation of large-diameter valves in explosion-proof areas, with a self-locking function to prevent misoperation. Its wafer design significantly reduces installation space and weight, lowering pipeline support and installation costs.
Power Generation Industry
Our high performance butterfly valve meets API 598 or GB/T 13927 Class D leakage rates at 6.4MPa pressure. In the governor oil system (high-frequency regulation) of a hydropower station, the JRVAL double eccentric butterfly valve’s maintenance cycle far exceeds that of the original valves.
Municipal Water Supply Industry
The precision double eccentric butterfly valve design allows for rapid, frictionless separation or low-friction contact between the disc and soft seat during opening/closing. This effectively protects the seat, reduces wear, and maintains excellent sealing performance even in networks containing small amounts of sediment or scale.
Marine/Shipbuilding Industry
JRVAL, as a high performance butterfly valve supplier, provides valve solutions for various vessels (e.g., cargo ships, oil tankers, LNG carriers, passenger ships, special engineering vessels). Product design and manufacturing processes are acceptable for inspection and certification by classification societies such as CCS, ABS, DNV, LR, BV, RINA, NK, KR.
Environmental Protection Industry
The SS316L material used in the high performance wafer butterfly valve performs excellently when handling industrial wastewater containing chloride ions and acidic flue gases. For slurries with solid particles, hardened discs or wear-resistant seats are available. JRVAL valves have been operating stably in the flue gas purification system (FGD/SCR) of a waste-to-energy plant for over 6 years with minimal corrosion and wear.
Food Processing Industry
The hp butterfly valve is made from food-grade stainless steel (typically SS316L), with highly polished internal and external surfaces (Ra≤0.8μm or better). Seats are made from food-grade EPDM/Silicone/PTFE materials compliant with FDA standards. The design features no dead corners, facilitating easy cleaning and sterilization (CIP/SIP).
Mining & Metals Industry
The eccentric butterfly valve (upgradeable to triple offset for severe abrasion) ensures rapid disc disengagement from the seat during opening/closing. This reduces sealing surface friction and scraping, effectively prevents slurry particles from jamming the valve, and lowers operating torque
Refrigeration Industry
The SS316L in the worm gear operated butterfly valve maintains good toughness even at -196°C. Special modified PTFE seats can be used from -100°C to +200°C. JRVAL valves have been operating stably on the liquid supply lines of a large ammonia refrigeration cold storage (-35°C environment) for over 7 years with no leakage records.
Desalination Industry
The unique bi-directional sealing design of the double eccentric butterfly valve allows it to withstand forward pressure (e.g., RO inlet) up to 25 bar (2.5MPa) and reverse pressure (e.g., system backwash, preventing concentrate/chemical backflow) up to 10 bar (1.0MPa). This ensures stable RO system operation and prevents cross-contamination and equipment damage.
High-Temperature & High-Pressure Environments
The high performance valve features an inherent fire-safe design (API 609) and an anti-blowout stem, ensuring operational safety under extreme conditions.
Corrosive Environments
JRVAL, as a double eccentric butterfly valve supplier, can provide materials compliant with NACE MR0175 / ISO 15156 standards, suitable for sour service environments containing H₂S.
Abrasive Environments with Particles
JRVAL's double offset high performance butterfly valve with a tungsten carbide coated disc can extend service life by 5-10 times compared to standard stainless steel discs under similar wear conditions. Stellite hardfaced discs can extend life by 3-5 times.
Vibration Environments
JRVAL’s optimized stem connection and support design for the high performance butterfly valve allows it to withstand continuous industrial vibrations, with some designs capable of handling vibration accelerations up to 2G.
Space-Constrained Environments
The most significant advantage of the high performance wafer butterfly valve is its extremely short face-to-face dimension. For example, a JRVAL PN16 DN200 butterfly valve has a face-to-face length of approximately 60mm
Cryogenic Environments
JRVAL's cryogenic butterfly valve, featuring an eccentric butterfly valve design, achieves bubble-tight zero leakage (e.g., API 598 or ISO 5208 Rate A) at its design temperature. For helium leak tests, it can achieve ≤1x10⁻⁶ Pa·m³/s (per customer requirements).
Water Supply Systems
JRVAL's double offset butterfly valve, with its EPDM seat and double eccentric structure, can achieve over 50,000 switching cycles in clean water media, with some optimized designs reaching over 100,000 cycles.
Wastewater Treatment Systems
The JRVAL's butterfly valve eccentric type, due to its optimized disc movement path from the double eccentric structure, can reduce the probability of jamming and clogging by approximately 40-60% compared to concentric butterfly valves.
Semiconductor Ultrapure Water Systems
Mirror-polished (Ra≤0.2μm) high performance double offset butterfly valve meets SEMI F57 standards with zero deadleg design
Fire Protection Systems
JRVAL, as one of the high performance butterfly valves manufacturers, can provide valves certified to API 609 or ISO 10497 fire tests, ensuring post-fire leakage meets standard requirements.
HVAC Systems
The precise flow regulation and near equal percentage flow characteristic of the JRVAL valve contribute to its excellent butterfly performance. Its adjustability ratio typically reaches 50:1 to 100:1, superior to concentric butterfly valves (usually 30:1), enabling finer temperature and flow control.
Fuel Gas Systems
The JRVAL's worm gear type butterfly valve offers low fugitive emissions, capable of meeting ISO 15848-1 BH C03 level (leakage rate ≤50 ppmv CH₄ at 200°C, 20,000 cycles) or API 624 requirements.
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Address: DaZhan Industrial Park, Xiaozhan Town, Jinnan District, Tianjin, China
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