1. Brief introduction of product: Hydraulic safety valve is installed safety valve on the tank, when the breathing valve failure or can not start, tank inside and outside pressure lose balance exceeds the specified value, hydraulic safety valve will automatically start the work, protection of storage tanks is not destroyed; and supporting the use of breathing valve, has a double insurance protection for storage tanks; hydraulic safety valve with the same specification arrester matching, is especially suitable in northern cold climate area, is widely used in the oil tank storage, petrochemical plants, oil, crude oil, gasoline, kerosene, diesel, aromatics and other liquid medium. Job control pressure tank hydraulic safety valve in three grades:
Type A：＋355Pa(＋36mmH2O)－295Pa(－30mmH2O)

Type B：＋980Pa(＋100mmH2O)－295Pa(－30mmH2O)

Type C：＋1750Pa(＋180mmH2O)－295Pa(－30mmH2O)

2. Items of installation:
1) hydraulic safety valve should be installed to ensure the safety valve schematic, joining pipe flange vertical, perpendicularity tolerance should be less than 50.

2) before installation of the hydraulic safety valve, check the hydraulic safety valve, clean the dust and other viscous substances by solvent;

3) The flange and a pressure of 3, hydraulic safety valve installation is as follows: PNo.6MPa.syJ464.

4) hydraulic safety valve is installed, remove the valve cover, the injection transformer oil tank, maintain and overflow liquid level tube flat on top.

3. Maintaining:
1) the equipment maintenance personnel carefully check the hydraulic safety valve level standard in the tank every time to send or receive before operation, timely fill oil;

2) generally a year should be cleaned once a set of hydraulic safety valve of the oil tank and replacement of hydraulic oil new.

3) in order to ensure the safety of the storage tank, the hydraulic oil level ruler into the display cannot be greater than 60mm.

4) at least three months to check the flame arrester, the dust arrester on-line and rust cleaning clean, avoid resistance barrage jam, lead to failure of the hydraulic valve, storage tank was pumping accident.

4. Product picture:

5. Technical parameters:
1) Specification and weight: