Characteristics and selection of diaphragm valves

The main Diaphragm Valve product names of China Diaphragm Valves Network include:GM Series High Vacuum Diaphragm Valve,Lift Fluorine Lined Check Valve,Manual Internal Thread Diaphragm Valve,Manual Pipe Pinch ValveManual Stainless Steel Sanitary Diaphragm Valve,Manual Weir-type Rubber Lined, Fluorine Lined Diaphragm Valve

(1) Low fluid resistance.

(2) Can be used for media containing hard suspended solids; Due to the fact that the medium only comes into contact with the valve body and diaphragm, there is no need for a stuffing box, and there is no problem of stuffing box leakage, which may cause corrosion to the valve stem.

(3) Suitable for corrosive, viscous, and slurry media.

(4) Cannot be used in high-pressure situations.

(5) The recommended range of use for diaphragm materials is as follows:

Diaphragm material (code) Operating temperature ℃ Applicable medium

Butyl rubber (Grade B) -40~100 has good acid and alkali resistance (85% sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid caustic soda, and various esters)

Natural rubber (Q-grade) -50~100 purified water, inorganic salts, diluted inorganic acids, etc

Polyfluoroethylene propylene (FEP or F46) is a highly corrosive medium containing sulfuric acid, hydrofluoric acid, aqua regia, high-temperature concentrated nitric acid, various organic acids and strong bases, strong oxidants, alternating concentrated and dilute acids, alternating acid and base, and various organic solvents with concentrations of up to 150

Soluble polytetrafluoroethylene (PFA) ≤ 180

High performance diaphragm valve High performance springless diaphragm valve [1]

1.316L VIM-VAR stainless steel valve body;

2. Suitable for high-purity applications;

3. Elgiloy material diaphragm, high strength, corrosion resistance, and long service life;

4. The fully enclosed PCTFE valve seat design has superior anti swelling and anti pollution capabilities;

5. Ultra high purity process specifications;

6. Electrolytic polishing of the surface in contact with the medium, with an average roughness Ra of 0.13 μ m

7. The maximum leakage rate for helium leak testing is 110 std cm/s

8. Low pressure and high pressure valve types;

9. Manual and pneumatic actuators;

10. Aluminum material piston accelerates the opening and closing speed of the valve;

11. Multiple handle forms and colors.

High performance all metal diaphragm valve [1]

1. All metal shell, no filler;

2. Repeatable closure with fully enclosed soft valve stem tip;

3. The pressure ranges from vacuum to 3500 PSI (241 bar);

4. Temperature range from -100 to 250 ° F (-73 to 121 ° C);

5. The maximum leakage rate for helium leak testing is 4x10 ^ -9 std cm/s;

6. The circular handle requires about one and a half turns from fully open to closed;

7. Bar shaped handle, only need to rotate the handle a quarter turn from fully open to closed.

Do you still need to know or purchase the following Diaphragm Valve products: