electric hydraulic cast iron knife gate valve

Product Design feature:

1. Knife gate valve is Bi-directional, Zero Leakage, withstanding high differential pressure and full bore Valve with minimal seat cavity for maximun flow capactiy.

2. No groove is designed on the valve seat, which prevents accumulating media on the sealing surface. And thus avoids sealing surface leakage or disc blockage caused by media accumulation.

3. The integrated body structure with precision casing.

4. U-shaped resilient seat is embeded into the body and is well-connected with the gate, and the friction force is reduced during the upard and downward movements of the gate. This greatly prolongs the using life of the seat and realizes bi-directional sealing.

5.The rubber O-ring is embeded into the flange groove ,which makes it convenient to connect the valve to pipe and provides reliable sealing

6. knife gate valve is widely used in urban sewage treatment, paper-making, mine slag discharge and the fields alike

Technical Parameter:

Size: DN50~DN1200 ( NPS 2~NPS 48 ):

Pressure Rating: 0.6 Mpa, 1.0 Mpa, 1.6 Mpa, 2.5 Mpa, Class 150

 
Testing
Testing includes a body shell test, a seat test and a cycling test to insure proper functioning of moving parts.
Standard Shell test: Hydro test at 1.5 times the rated CWP (cold working pressure) Zero allowable leakage
Standard Resilient Seat test: Hydro test at 15 psi (1 bar) and rated CWP
 
Max. operating pressures for GAOCHUANG type PZ43 Knife Gate Valves:
DN050-DN250:  10 bar
DN300-DN400:   6 bar
DN450:              5 bar
DN500-DN600:   4 bar
DN700-DN1200: 2 bar