What are the sealing materials of imported pneumatic soft seal butterfly valves
summary
Soft seal butterfly valve is a more common and commonly used type of butterfly valve, and it is a model butterfly valve with a large amount of use, but from the perspective of the sealing material of soft seal butterfly valve, there are still multiple types. However, they are all soft-sealed, why there is a difference in materials, this article will analyze it in detail.
body
The sealing surface is also called the valve seat, which is the sealing part in the butterfly valve body channel, and the imported pneumatic soft seal butterfly valve seat soft sealing materials include rubber (natural, nitrile, EPDM, silicone rubber, fluorine rubber) and plastic (PTFE, polyolefin, polypropylene, nylon). The sealing surface material of the soft seal butterfly valve is often seen in three types: EPDM, nitrile and PTFE. These three different materials of soft seal butterfly valves also have different characteristics and applications.
1. Nitrile rubber pneumatic soft seal butterfly valve
Nitrile rubber, code name NBR, one of the biggest characteristics of this material is that it has excellent oil resistance, in addition to a certain degree of wear and heat resistance. The soft seal butterfly valve uses nitrile rubber as the sealing surface material, which can be applied to oil medium in oil pipelines. In addition, nitrile rubber is not suitable for fresh water and other media, because it contains a certain toxicity, which will cause harm to human health.
2. EPDM pneumatic soft seal butterfly valve
It is also called EPDM, code EPDM. EPDM rubber is the most commonly used seat material for soft seal butterfly valves, and it is also very widely used. And EPDM rubber is ozone resistant, aging resistant, long service life, EPDM is the seat material of the soft seal butterfly valve suitable for the medium of fresh water, sewage, seawater and similar mud and other media containing impurities.
3. PTFE pneumatic soft seal butterfly valve
PTFE is a fluoroplastic with the code name PTFE. PTFE is characterized by resistance to various acids and alkalis and various organic solvents; The use of PTFE as the seat material of the soft sealing counterpart, mainly used in chemical industry, oil refining, chemical fiber, phosphate fertilizer, non-ferrous smelting, acid production, dyeing and other industries, the applicable media are corrosive strong acid and alkali media.
However, different soft sealing materials generally have the following parameter characteristics
DIAMETER: 50MM-1200MM
Nominal pressure: 0.6MPa, 1.0MPa, 1.6MPa
Applicable temperature: -20°C~+120°C
Applicable medium: water and neutral liquid.
Body material: ductile iron, cast steel, stainless steel, aluminum alloy, copper
Seat material: NBR/EPDM/PTFE/VITON
Butterfly plate: DI/WCB/CF8/CF8M/C954
Shaft: 45/420/304/316
Drive: Handle/Turbo/Pneumatic/Electric
Applications: municipal construction, water treatment, electric power, water supply and drainage, water conservancy engineering
Rubber sealing, rubber EPDM rubber, fluorine rubber, nitrile rubber and other high elasticity rubber optional, mainly used in clean water or medium-sized liquid medium, to achieve the control medium on, truncated, adjust the function, control mode can be selected manual, can also be selected according to the needs of Pneumatic Actuator or electric actuator to achieve remote control. It is used in municipal construction, water treatment, electric power, water supply and drainage, water conservancy engineering and other fields.
