Double Flanged Triple Offset Butterfly Valve - Carbon Steel

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.

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.

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.

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.

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.

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.

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.

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.

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. 

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.

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.

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.