Diaphragm valve according to the structural form can be divided into: house type, straight flow, cut-off type, straight through type, gate type and right Angle type six; The connection form is usually flange connection; According to the driving mode can be divided into manual, electric and pneumatic three, pneumatic drive is divided into normally open, normally closed and reciprocating three.
Right Angle diaphragm valve:
Also known as the emergent edge type, it is the most basic of a common code name (G41). Its body is lined. Diaphragm body lining is designed to maximize its corrosion resistance. This kind of structure, in addition to the straight through, can also be made into a right Angle.
Roof diaphragm valve:
Its structure shape is similar to the globe valve, this form of diaphragm valve, fluid resistance is larger than the right Angle diaphragm valve, but the sealing area is large, sealing performance is good, can be applied to the high vacuum degree of the pipeline.
Straight-through diaphragm valve:
Its structure is similar to gate valve, gate diaphragm valve fluid resistance is small, suitable for conveying viscous materials. Diaphragm materials commonly used natural rubber, neoprene rubber, butyl rubber, butadiene rubber, isobutyl rubber, fluorinated rubber and polyfluoroethylene propylene plastic (F46). The disadvantage of diaphragm valve is that the pressure is not high, generally within 6kgf/cm2(0.6MPa); Temperature resistance is also limited by the diaphragm, generally only 60~80℃, ≤(fluorinated rubber) does not exceed 180℃.