Valve Body: Ductile Iron (GGG50)

Hand Wheel: Ductile Iron (GGG50)

Gland Flange: Ductile Iron (GGG50)

Valve Disc: Ductile Iron (GGG50)

Stainless Steel Valve Stem: 2Cr13 (Stainless Steel)

Valve Seat Ring: EPDM/NBR/PTFE

Thrust washer: Brass

Wedge Nut: Bronze

Pressure: PN10/16 (Can change gland ring under the pressure of 20kg)

Size: DN50~600

 

Parameters:

Size Range: DN 50-600

Working pressure: PN10,16

Working temperature: -40°C – +120°C

Flange drilling standard: JB/79  ANSI/16.5

Surface Treatment: Akzo Nobel Fusion Bonded Epoxy

 

1. Introduction:

GOST  30ч39р Resilient Valve Gate is designed according to the Russian National Standard, which is now adopted by the following countries: Russia, Belarus, Ukraine, Moldova, Kazakhstan, Azerbaijan, Armenia, Kyrgyzstan, Uzbekistan, Tajikistan, Georgia, and Turkmenistan.

This type of valve is made with ductile iron (GGG50), which exhibits high strength, flexibility, durability, and elasticity. Besides, the rubber service inside will maintain its original shape securing a top-tight sealing.

2. Applications:

Portable water, water distribution service and feed lines

Sewage disposal

Irrigation

Fire protection systems

 

3. Installation Tips:

Ensure that the pipeline bore is fully cleaned & there are no foreign material, debris, particles, welding residue in the pipeline. It is recommended to flush the pipeline for easy removal of foreign particles.

The flange faces also have to be perfectly clean & devoid of any foreign particles/oil/grease or rust preventer.

Also, ensure that the duty parameters of the valve & the application requirements are Matching.

Check & ensure that the rubber encapsulation on the wedge is fully intact & there are no dents, cracks, swells, bulges, etc.

 

The pipeline on either side of the valve has to be independently supported. Ensure that no pipeline load due to any of the following parameters gets transmitted to the valve:

Pipeline weight, the weight of water in the pipeline; Loads, forces & moments due to thermal expansion & contraction of the pipeline; Loads due to settlement/wash-out of the soil-bed below the pipeline;

Loads due to hydrodynamic reaction forces, thrusts of the flow due to grade & direction changes; Weight of the landfill above the pipeline in a trench after installation;

Loads due to the traffic over the buried pipeline; Avoid any stress-induced due to welding in the pipeline, up to a distance of 4D on either side of the valve.