First, the working principle
The fire butterfly valve is a valve that uses a circular disc as a starting and closing member and rotates with the valve stem to open, close and adjust the fluid passage. The butterfly plate is driven by the valve stem. If it is rotated through 90°, it can be opened and closed once. By changing the deflection angle of the disc, the flow of the medium can be controlled.
Second, the product introduction
The fire butterfly valve produced by our company has two kinds of handle fire butterfly valve and turbo fire butterfly valve. The valve body is made of ductile iron, the disc is made of chrome-plated cast iron, the sealing material is EPDM, and the shaft is made of 45# steel. Fire butterfly valve production standards: "GB5135.6 automatic sprinkler system part 6: general valve." The fire butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. And it only needs to rotate the handwheel to open and close quickly, easy to operate, and has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the disc is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics.
Third, product use
The fire butterfly valve is installed on the system pipe because it has good flow regulation function and closed sealing characteristics, mainly for cutting and throttling. When the pipe network is repaired, turn it off. It has the following advantages:
a. It is convenient, quick, labor-saving, and has low fluid resistance. It can be operated frequently.
b. Compact and lightweight, easy to disassemble and repair, and can be installed in any position.
c. Minimize the accumulation of liquid at the mouth of the pipe.
d. A good seal can be achieved at low pressure.
e. Good adjustment performance.
Fourth, product model and technical parameters
Applicable medium: water or fire foam mixture
Adapt to temperature: -20 ~ 120 ° C
Nominal action pressure: 1.6Mpa
Sixth, installation and maintenance instructions
a. . Before installation, carefully check that the valve is intact and not damaged.
b. When installing, the disc should stop in the closed position.
c. The opening position should be determined by the angle of rotation of the disc.
d. The butterfly valve can be installed on horizontal and vertical pipes, and the installation position should be convenient for maintenance and replacement.
e. The valve should be regularly inspected for wear on the sealing surface. If the damage fails, it should be repaired or replaced in time.
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1. When ordering a fire butterfly valve, please indicate the product name, model, specification, quantity and required delivery date in the order.
2. The fire butterfly valve configuration includes: one fire butterfly valve, one instruction manual and one certificate. If there is any increase or decrease due to design requirements, please indicate when ordering. If you need other accessories, you must order separately.