A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.

A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The “butterfly” is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.

High performance butterfly valve is generally made to use on the high pressure piping system. The high performance double offset butterfly valve, used in higher-pressure systems, is offset from the centre line of the disc seat and body seal (offset one), and the centre line of the bore (offset two). This creates a cam action during operation to lift the seat out of the seal resulting in less friction than is created in the zero offset design and decreases its tendency to wear.

EMIS high performance butterfly valve offers the high-performance butterfly valves with the low-cost, lightweight benefits of a butterfly valve design. It is ideal for handling water, oil, steam, gas, and slurries. Huamei high-performance butterfly valves satisfy a wide range of industrial applications. Available in carbon steel or stainless steel, as well as lug and wafer body styles, they can be specified in sizes 2″ through 60″.

Main Product Features:

1. Double offset/eccentric design with bi-directional bubble-tight shutoff performance, extrmely high pressure application than ordinary butterfly valves.
2. Double offset/eccentric configuration with conical angled disc design. Long life durability due to double offset operating principle minimizing seat wear.
3. High pressure application with small torque. Maximize flow and minimize resistance providing high Cv.
4. Seat available in either Soft (PTFE/RTFE), Metal or Fire Safe. Fast and simple seat replacement. All of soft seats, Metal seats and Fire Safe seats are interchageable.
5. Excellent corrosion resistance.
6. Internal travel stop design to prevent over travel of the disc, minimizing possible seat damage.

Soft Seat
ANSI Class 150 2″-60″ (50-1500mm)
ANSI Class 300 2″-48″ (50-1200mm)
ANSI Class 600 2″-24″ (50-600mm)
Metal Seat
ANSI Class 150 2″-30″ (50-750mm)
ANSI Class 300 2″-24″ (50-600mm)
Fire Safe Seat
ANSI Class 150 2″-30″ (50-750mm)
ANSI Class 300 2″-24″ (50-600mm)

Our HPBFVs can fully cover pressure ratings as below:
ANSI Class 150 to 285 psi (2000 kPa)
ANSI Class 300 to 740 psi (5100 kPa)
ANSI Class 600 to 1440 psi (10000 kPa)
DIN ISO PN16/PN25 to 2500 kPa (25bar)
DIN ISO PN40 to 4000 kPa (40bar)
DIN ISO PN100 to 10000 kPa (100bar)

Soft Seat -20°F to +500°F (-29°C to +260°C)
Metal Seat -60°F to +1022°F (-51°C to +550°C)
Metal Seat (Cryogenic) -320°F to +250°F (-196°C to +121°C)
Fire Safe Seat -60°F to +1022°F (-51°C to +550°C)

ASME B16.5: Class 150, 300, 600

DIN ISO PN10, PN16, PN25, PN40

JIS B2210: 10K, 16K, 20K

Basic design: ANSI B16.10 / API 609 / MSS-SP-68 / ISO 5752, or other sepcial designs available upon request.

Our high performance butterfly valves are widely used in many industries including heating,ventilating and air conditioning, power generation,hydrocarbon processing, water and waste water treatment, and marine and commercial shipbuilding. Ourdouble offset high performance butterfly valves are also installed in applications as diverse as food and beverage processing, snowmaking and pulp and paper production. Configurations are available for harsh conditions as well as applications requiring nominal pressure and temperature ratings.

Pulp and Paper Mills
Chemical / Petro-Chemical
Oil Refineries and Oil Field
Liquified Gas / Refrigeration
Ship Building
Heavy Industrial
Hydrocarbon Processing
Power / Co-Generation Plants
Gas Piping
Steel and Iron Works
Local Area Energy Supply

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