GYA Type dead weight safety valveProduct Overview
Hydraulic valve is installed the configured safety valve in the breathing valve on the tank breathing valve fails or can not effectively start, the pressure inside and outside the tank out of balance exceeds the specified value, the hydraulic valve will automatically start working to protect the tank is not destroyed;supporting the use of the breathing valve has a double insurance protection tank role; hydraulic valve with the same specifications flame arrester supporting, in particular, to adapt to the cold weather in northern regions, widely used in oil, petrochemical plants, oil depots and storage of crude oil, gasoline, kerosene,diesel oil, aromatic hydrocarbons such as liquid medium tank.
Hydraulic safety valve control of pressure or vacuum value 10% higher than that of mechanical breather valve, so under normal circumstances is not action.Inside the valve with high boiling point volatile (summer), slow evaporation and low solidifying point (not frozen in winter) of oil (e.g., light diesel oil, the oil or transformer oil) as sealing liquid (liquid).This valve shall generally be installed in the pipeline.
Hydraulic a safety protection valve, relief valve open-close part of it under the action of external force in a normally closed state, when the equipment or piping within the medium pressure increases, more than a specified value automatically when open, through a discharge medium system to prevent the pipeline or equipment within the medium pressure in excess of the prescribed value.Relief valve belong to automatic valve class, mainly for the boiler, pressure vessel and piping, control pressure shall not exceed the specified value, to protect personal safety and equipment operation plays an important role.According to open the relief valve disc height can be divided into micro enlightening the safety valve and the safety valve, raise safety valve opening stroke height is: 0.05 or less do discharge throat diameter (minimum);Rev. All safety valve opening for 0.25 or less do discharge throat diameter (minimum).Main Use
1.hydraulic valve (valve type) breathing valve a safety backup device, the action of the inspiratory and expiratory pressure slightly higher than the (valve) breathing valve in the breathing valve failure or valve in the winterfreeze, hydraulic valve liquid seal incurs damage so as to protect the tank from destruction.
2.hydraulic valve mounted at the top of the tank with the breathing valve used in conjunction.
3.the control pressure: +200mmH2
O ~ -45mm mmH2
1.hydraulic valve schematic diagram for installation, ensure that the safety valve of the joint pipe flange vertical, vertical tolerances should be less than 50.
2.the before installing hydraulic valve, the first hydraulic valve inspection with a sol vent scrubbing dust and other sticky substances;
3.flange standards and pressure of hydraulic valve installed as follows: PN0.6MPa. JB78-59.
4.the hydraulic valve installed, take off the valve cover, the injection transformer oil sump to maintain the top level of the liquid level of the overflow pipe.Maintenance
All kinds of safety valve should be installed vertically.
The relief valve outlet should be without resistance, avoid to produce compression phenomenon.
Safety valve before installation should be specially test and check its official seal.
The relief valve should be of use in regular inspection.
1. Liquid-pressure style safety valve is a assistant equipment of the breathing valve (moving disc style), the active pressure of aspi-ration and expiration is higher than breathing valve (moving disc style), as upon once the breathing valve does not work in winter, themoving disc will be frozen, the liquid seal of the liquid-pressure style safety valve can be broken for protecting the oil tank.
2. Liquid-pressure safety valve will be installed in top of oil tank and assorted used with breathing valve.
3. The control pressure: +56mm water column to -50mm water column.
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