SG4A high-performance trunnion butterfly valve, stainless steel high-performance butterfly valve

Butterfly valve refers to a type of valve in which the closing element (disc or disc) is a disc that rotates around the valve axis to achieve opening and closing. It mainly serves as a shut-off and throttling valve on pipelines. The butterfly valve opening and closing part is a disc shaped butterfly plate that rotates around its own axis within the valve body to achieve the purpose of opening, closing or adjusting. The butterfly valve is usually less than 90 ° from fully open to fully closed, and the butterfly valve and stem do not have self-locking ability. In order to position the butterfly plate, a worm gear reducer needs to be installed on the valve stem. The use of a worm gear reducer not only enables the butterfly plate to have self-locking ability and stop at any position, but also improves the operational performance of the valve. The characteristics of industrial butterfly valves are high temperature resistance, high pressure range, large nominal diameter, carbon steel body, and metal ring instead of rubber ring for valve plate sealing. Large high-temperature butterfly valves are manufactured by welding steel plates and are mainly used for high-temperature medium flue gas ducts and gas pipelines.

The advantages of butterfly valves are as follows: 1. Convenient and fast opening and closing, labor-saving, low fluid resistance, and can be operated frequently. 2. Simple structure, small size, and light weight. 3. It can transport mud and store the least liquid at the pipeline mouth. 4. Under low pressure, good sealing can be achieved. 5. Good tuning performance.

The disadvantages of butterfly valves are as follows: 1. They have a small range of operating pressure and temperature. 2. Poor sealing performance.

Butterfly valves can be divided into offset plate type, vertical plate type, inclined plate type, and lever type according to their structural form. According to the sealing form, it can be divided into two types: relatively sealed and hard sealed. The soft sealing type usually uses rubber ring sealing, while the hard sealing type usually uses metal ring sealing. According to the connection type, it can be divided into flange connection and wafer connection; According to the transmission mode, it can be divided into several types: manual, gear transmission, pneumatic, hydraulic, and electric.

The installation and maintenance of butterfly valves should pay attention to the following matters: 1. During installation, the valve disc should be stopped in the closed position. 2. The opening position should be determined according to the rotation angle of the butterfly plate. 3. Butterfly valves with bypass valves should be opened before opening. 4. A heavy butterfly valve should have a solid foundation.

The unique design of three-way eccentricity ensures frictionless transmission between sealing surfaces, extending the service life of the valve.

Elastic sealing is generated by torque.

The clever wedge design enables the valve to have an automatic sealing function that tightens as it closes, with compensatory and zero leakage between sealing surfaces.

Small size, light weight, easy to operate, and easy to install.

Pneumatic, electric, hydraulic, and manual devices can be configured according to user requirements to meet the needs of remote control and program control.

Nominal diameter: DN50- DN1200

Drive mode: pneumatic, electric, handwheel, turbine

Working pressure: PN25

Working temperature: -15-85 ℃, -15-150 ℃, -15-200 ℃

Sealing material: EPDM, PTFE, NBR, VITON

Valve plate material: SS304 SS316 nylon ductile iron plate 2205 2507 1.4529

Valve body material: ductile iron SS304 SS316 WCB 2205 2507 1.4529

Medium: water, oil, gas, powder particles, flue gas desulfurization

Application fields: water treatment, municipal engineering, pharmaceuticals, automotive industry