Double Flanged Triple Offset Butterfly Valve - Carbon Steel

Petrochemical & Chemical

Designed for non-strongly corrosive substances (or lined/specially treated applications) requiring high temperature, wear/fire resistance, and zero leakage, Our high pressure butterfly valve provide emergency shut-off, on-off control, and limited regulation for media like steam, oil, hydrocarbons, gas, dust, and water.

Power Generation Industry

JRVAL’s metal to metal seated butterfly valves meet ASTM standards for WCB material properties, with EN 10204 3.1 certification. For power plant water, optional internal/external FBE epoxy coatings (250μm+, spark tested) enhance corrosion resistance.

Municipal Water Supply Industry

Our triple eccentric flange valves, with their low friction, low torque, and long life, are ideal for large diameters. The hard seal (or composite elastic seal) ensures long-term zero leakage, reducing water waste. Bidirectional sealing and protective coatings for drinking water safety align with expectations for an awwa butterfly valve in such applications.

Marine/Shipbuilding Industry

Designed for shipboard vibration with effective stem bearings and packing, this api 609 butterfly valve is up to 50% lighter and 60% shorter than comparable gate valves, optimizing ship layout and center of gravity.

Environmental Protection Industry

The JRVAL flange triple eccentric butterfly valve ensures bidirectional bubble-tight shut-off, preventing pollutant leakage. It offers 50-70% lower seal wear than centerline valves in wastewater with particles. Anti-static designs and ATEX actuators are available for flammable media like biogas.

Food Processing Industry

JRVAL’s carbon steel triple offset butterfly valves use food-grade materials, meeting sanitary butterfly valve standards. Discs/stems (typically SS316L, with carbon steel body) feature Ra≤0.8μm mirror polish; seals are food-grade PTFE/RPTFE/EPDM/NBR per application.

Mining & Metals Industry

JRVAL’s carbon steel triple eccentric hard seal butterfly valve excels with its ultra-hard sealing. Optional laser-cladded or plasma-sprayed Tungsten Carbide (WC-CoCr) on seat/disc faces (HV1200-1400, HRC 70+) makes it extremely wear-resistant for abrasive media.

Refrigeration Industry

Our double flanged triple offset butterfly valves feature heavy-duty anti-corrosion coatings (e.g., epoxy zinc-rich primer, epoxy MIO, chlorinated rubber; 200-250μm DFT) for humid cold storage. For -20°C to -29°C, materials like ASTM A350 LF2 or A216 WCC (impact tested, heat-treated) ensure low-temp toughness, meeting cryogenic butterfly valve performance needs.

Seawater Desalination Industry

JRVAL’s double flanged triple offset butterfly valve feature Sa2.5 sandblasted bodies with a 3-layer marine-grade coating (epoxy zinc-rich primer, epoxy MIO, polyurethane topcoat; 250-350μm DFT). It passes 1000hr salt spray tests (ASTM B117), resisting marine atmosphere and seawater splash.

High-Temperature & High-Pressure Environments

JRVAL strictly follows ASME B31.1, B31.3, and ASME B16.34 standards for the selection and design of high-temperature and high-pressure valve materials. We offer a full range of materials from WCB to WC9, C12A, F91, F92, etc., with all high-temperature materials backed by original mill test certificates and heat treatment reports. As one of triple offset butterfly valve manufacturers, JRVAL ensures reliable performance in extreme conditions.

Cryogenic Environments

Our ltcs valve features metal-to-metal or metal + flexible graphite composite sealing technology, maintaining elasticity even at cryogenic temperatures. This ensures stable sealing performance without leakage issues commonly caused by soft seal materials hardening or shrinking in cold environments.

Corrosive Environments

The valve body comes standard with a 250μm epoxy coating, with optional SigmaShield high-performance coating that withstands salt spray tests for over 1000 hours; the disc and seat can be made from SS316L, duplex steel, or Hastelloy. JRVAL, as one of rubber lined butterfly valve manufacturers also offer customized lining solutions to enhance corrosion resistance.

Particulate Abrasive Environments

Our triple offset metal seated butterfly valve features Stellite 6/21 overlay weld on sealing surfaces (thickness ≥2mm), with options for solid tungsten carbide or WC spraying; it also includes self-lubricating PTFE + stainless steel composite bearings with dust scraper design to significantly extend service life.

Space-Constrained Environments

The triple eccentric butterfly valve design reduces operating torque by 20–30%, allowing for smaller, lighter, and more compact actuators. JRVAL also offers integrated actuator solutions, ideal for space-constrained installations.

Vibrating Environments

The eccentric butterfly valve design of JRVAL’s headless stainless steel triple eccentric hard seal high-pressure flange butterfly valve ensures minimal friction during operation. The three eccentric structure allows the disc to nearly frictionlessly open/close while forming a rigid wedge contact with the multi-layer metal seat upon closure. This design resists displacement under vibration, maintaining airtight seals even in harsh conditions. Compared to soft seals, the hardened metal-to-metal sealing mechanism is less prone to deformation or damage from mechanical shocks.

Water Supply Systems

Carbon steel butterfly valve offers cost-effectiveness and excellent mechanical strength, meeting common pressure requirements for water supply systems. For corrosion protection, especially in potable water applications, both inner and outer surfaces of the valve body are coated with epoxy resin powder (FBE) to a thickness of 250μm, complying with WRAS and NSF/ANSI 61 drinking water safety standards.

Wastewater Treatment Systems

The triple offset butterfly valve features metal-to-metal or composite seals, effectively resisting wear from sand, stones, and solid particles in wastewater. Its triple eccentric design ensures rapid valve plate disengagement from the seat during opening and a “scraping” effect during closing, minimizing clogging risks.

Gas Systems

JRVAL engineers recommend optimal material combinations for the components of metal to metal butterfly valve based on gas composition, temperature, pressure, particulate content, and corrosivity. For instance, in high-sulfur flue gas applications, the sealing surface can be upgraded with alloys exhibiting superior sulfur resistance. The valve body and shaft seal materials are also tailored to withstand extreme conditions, ensuring long-term reliability even in corrosive or abrasive environments. 

Fire Protection Systems

The api 609 triple offset butterfly valve meets API 609 fire protection standards with a multi-layer stainless steel and high-purity flexible graphite composite seat seal, ensuring zero leakage at ambient temperatures and low leakage after fire exposure. Fire-resistant packing and a fire seal gland further protect against high-temperature seal failure.

HVAC Systems

The hvac butterfly valve from JRVAL optimizes valve plate design, achieving 5-10% higher Cv/Kv values than traditional butterfly valves, reducing system pressure loss and lowering pump energy consumption. Its operation torque is 15-25% lower than competitors, enabling the use of smaller electric actuators for further energy savings.

Fuel Gas Systems

The metal seated butterfly valve achieves ISO 5208 Rate A or API 598 zero leakage (gas tested). For example, a DN200 valve under 1.0MPa methane gas has a leakage rate <1×10⁻³ Pa·m³/s. Low-leakage packing (e.g., TA-Luft-certified graphite) and valve stem seals meet ISO 15848-1 BH C03 standards.