Resilient Seated Butterfly Valve

Technical Data

Size range

Body Material

Wafer type: 2"~24"(DN50~DN600)

Lug type: 2"~48"(DN50~DN1200)

Flange type:2"~12"(DN50~DN3000)

Cast iron, Ductile Iron, Carbon Steel, Al-bronze etc.

Temperature range	Stem Material
-20°F to 400°F (-29°C to 204°C)	Stainless Steel, Monel K500

Pressure ratings

Disc Material

175 psi (12 Bar)

150 psi (10 Bar)

Nylon 11 Coated Ductile Iron, Aluminum Bronze, Stainless Steel

Shuttoff ratings	Seat Material
Bidirectional Bubble-tight	Bonded EPDM, Bonded BUNA-N, Bonded FKM,PTFE

Design and Manufacturing Standard	Face to Face
API 609, EN593, JISB2032, GB/T12238, AWWAC504	API 609, EN558, JISB2002, GB/T12221, AWWAC504

End connection

Testing

ASME B16.1 Class 125, ASME B16.5 Class 150,

EN 1092 PN10, PN16, GB/T 17241, GB/T 9113,

JIS B2220

MSS SP-61, API 598, EN 12266-1,JIS B2003, GB/T13927

Features & Benefits

Huanqiu^tmResilient seated butterfly valve, also called Centerline elastic seat soft sealing butterfly valve. Its center of the stem, the center of the disc, and the center of the body is in the same line. The structure is simple and the manufacturing is easy. Because of the disc and the valve seat is always in a state of squeezing and scratching； so the resistance distance is large and the wear would be fast. In order to overcome squeezing and scratching, and to ensure the sealing performance, the valve seat basically uses elastic materials such as rubber or polytetrafluoroethylene; The operating temperature shall be in the range of -20°C to 120°C because of the sealing material limited by temperature. Resilient seat butterfly valve is an excellent choice for continuous adjustment and control, with ultimate pressure to 250 psi and vacuum to 24"Hg.

Design

Huanqiu resilient seated butterfly style one-piece or two a valve stem having a straight two-stage design and high strength without the pin, and using the inner valve stem connected to the valve. The main connection methods of the valve are wafer type, lug type and flange type.

Our butterfly valve is designed to provide two-way air-tight closure and isolate the pipeline medium from the valve stem or valve body, with low torque and easy closing. And it has a variety of high-quality elastic seat and disc materials for various applications, which can easily realize the automation of on/off or adjustment services.

A Gland：material stainless steel. It prevents unintentional removal of the stem during field service.

B Stem Bushing：Non-corrosive, heavy duty acetal bushing absorbs actuator side thrust.

C Stem seal: Self-adjusting and gives positive sealing in both directions.

D Neck：Extended neck length allows for 2" of piping insulation and is easily accessible for mounting actuators.

E Disc：Casting is spherically machined and hand polished to provide a bubble-tight shutoff, minimum torque, and longer seat life.

F Body: Polyester coating for excellent corrosion resistance. Nylon 11 coating is available as an option.

G Secondary Seal: These seals prevent line media from coming in contact with the stem or body. Primary Seal is achieved by an interference fit of the molded seat flat with the disc hub. Secondary Seal is created because the stem diameter is greater than the diameter of the seat stem hole.

H Stem:The stem drives the valve disc is an exclusive feature of the valve. Disassembly of the stem is just a matter of pulling the stem out of the disc.

I Seat：The seat lowers torque and provides complete isolation of flowing media from the body. The seat also features a molded O-ring which eliminates the use of flange gaskets.

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