Shanghai Pudie Convex Ear Butterfly Valve Series Products

Clamp on lug butterfly valve-Shanghai Pudie Valve Co., Ltd

1.Clamp on lug butterfly valveIntroduction:
The butterfly plate of the clamp type lug butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, with a rotation angle between 0 ° and 90 °. When it rotates to 90 °, the valve is fully open.

The clamp type butterfly valve is connected between two pipeline flanges using double headed bolts. It has a simple structure, small volume, and light weight, and is composed of only a few parts. And it can be quickly opened and closed by simply rotating 90 °, with simple operation, and the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance for the medium to flow through the valve body. Therefore, the pressure drop generated by this valve is very small, and it has good flow control characteristics. Butterfly valves have two sealing types: elastic sealing and metal sealing. Elastic sealing valve, the sealing ring can be embedded on the valve body or attached around the butterfly plate.

2.Clamp on lug butterfly valveApplication scope:
Butterfly valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also in the cooling water system of thermal power plants.

Used for gas pipelines in the sulfuric acid industry: inlet and outlet of furnace front blower, inlet and outlet of relay blower, series and connecting valves for electric mist removal, inlet and outlet of S02 main blower, converter adjustment, preheater inlet and outlet, etc., for regulating and cutoff gas volume.

Used in the sulfur burning, conversion, and dry absorption sections of sulfur based sulfuric acid systems, it is the preferred brand of valves for sulfur based sulfuric acid plants. It is widely regarded by users as a butterfly valve with good sealing performance, light operation, secondary corrosion, high temperature resistance, easy and flexible operation, and safe and reliable use. It has been widely promoted and used.

Clamp type butterfly valves are also widely used as regulating and shut-off devices in pipelines for media such as SO2, steam, air, coal gas, ammonia, CO2 gas, oil products, water, salt water, alkali solution, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid, etc. in industries such as chemical, petrochemical, smelting, pharmaceutical, and food.

3.Clamp on lug butterfly valveStructural features:
① The unique design of three-way eccentricity ensures frictionless transmission between the sealing surfaces, extending the service life of the valve.
② Elastic sealing is generated by torque.
③ The clever wedge-shaped design enables the valve to have an automatic sealing function that becomes tighter as it is closed, with compensatory and zero leakage between the sealing surfaces.
④ Small size, light weight, easy operation, and convenient installation.
⑤ Pneumatic and electric devices can be configured according to user requirements to meet the needs of remote control and program control.
⑥ Changing the material of the parts can be applied to various media and can be used for lining anti-corrosion (lining F46, GXPP, PO, etc.).

Compared with ordinary butterfly valves and gate valves with the same nominal pressure and nominal diameter, the sealing performance of gate valves is better than that of butterfly valves.
Gate valves have a large volume and take up a lot of space.
Butterfly valves have a small volume and take up less space.
When selecting, the temperature of the medium, the sealing of the valve, and the packing should also be considered.
Standardize the use of disc valves with a nominal diameter greater than 50.
The high-performance manual clamp butterfly valve adopts a double eccentric and a special oblique cone elliptical sealing structure. Solved the problem of traditional eccentric butterfly valves still having sliding contact friction on the sealing surface during opening and closing from 0 ° to 10 °, achieving the effect of separation of the sealing surface of the butterfly plate at the moment of opening and sealing at the moment of closing contact, thus extending the service life and achieving the best sealing performance.

4.Clamp on lug butterfly valveStandard specifications:
Design and Manufacturing Standards: GB/T 12238-2008, ANSI B16.34, API609, MSS SP-68, JIS B2032, JIS B2064
Structural length standards: GB/T 12221-2005, API609, JIS B2002
Connection flange standard: GB/T 9113、JB79、SH3406、HG20592、ASME B16.5、ASME B16.47、API605、JIS B2212
Pressure and temperature rating: GB/T 12224-2005
Test and inspection standards: GB/T 13927-2008, API598, JIS B2003