Product features of normally closed pneumatic rubber-lined diaphragm valve:
Model G6B41J-10 Normally closed pneumatic G6B41W-6 Model G6B41J-4 Model G6B41FS-6 Design and manufacturing according to: GB12239
Structure length according to: GB12221
Flange connection size according to: GB 4216.4
Test and inspection according to: GB/T 13927 normally closed pneumatic rubber-lined diaphragm valve

Structural features of G6B41F pneumatic fluorine-lined diaphragm valve

1. The composite diaphragm separates the inner cavity of the lower part of the valve body from the inner cavity of the bonnet, and forms a direct current channel with it, so that the inner parts such as the valve stem and the valve clack on the upper part of the diaphragm are completely isolated from the medium, and the packing seal structure is omitted. Internal leakage and external leakage can be avoided at the same time.
2. The diaphragm as the actuator is prone to fatigue fracture due to frequent opening and closing, and should be replaced regularly according to the working conditions and medium characteristics.
3. The diaphragm made of FEP (Teflon) fluoroplastic and synthetic rubber and the valve with Feflon fluoroplastic lining layer can be suitable for various strong corrosive media except “melting alkali metal and elemental fluorine”.
4. See “Performance Table of Fluoroplastic Lining for Valves and Pipeline Accessories” for the anti-corrosion performance and recommended temperature of fluoroplastics.

Various models of G6B41Fs pneumatic fluorine-lined diaphragm valve

Manual G41F3(Weir) Pneumatic G641F3
G41F46(Weir) G641F46
G45F3(Weir) G6B41F3
G45F46(Weir) G6B41F46
Electric G9B41F3(Explosion-proof) Electric G941F3
G9B41F46(Explosion-proof) G941F46

G6B41Fs pneumatic fluorine-lined diaphragm valve parts materials

NO Name Grey cast iron Cast steel Stainless steel Ultra low carbon stainless steel
1 Valve body, valve cover, valve clack HT250 WCB CF8 CF8M CF3 CF3M
2 Stem 35 1Cr13 1Cr18Ni9Ti 1Cr18Ni12M02Ti 00Cr18Ni10 00Cr17Ni14M02
3 Lining layer FEP(F46) PFA PCTFE(F3)
4 Diaphragm FEP(F46)/CR(Fluorobutadiene rubber)  PFA(Soluble polytetrafluoroethylene)/FPDM(Ethylene Propylene Rubber)
5 Stem nut ZCuAl10Fe3 ZCuAl10Fe3
6 Screw bolt 35 35 1Cr17Ni2 1Cr17Ni2 1Cr17Ni9Ti 1Cr17Ni9Ti
7 Nut 45 45 0Cr18Ni9 0Cr18Ni9 0Cr18Ni9 0Cr18Ni9
8 Handwheel HT200 HT200 WCC WCC WCC WCC

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