GHF-1 type fire breathing valveDetailed product description：

The main purpose of GHF-1 fire breathing valve
The GHF-1 fire breathing valve is installed on the top of the oil tank to reduce the evaporation loss of oil in the tank, control the pressure inside the tank, and ensure fire safety.

GHF-1 type fire breathing valve operating pressure
Positive pressure:+180mm water column Negative pressure: -30mm water column

Schematic diagram of the structure of the fireproof breathing valve

Install
Remove the top breathing valve ① of the oil tank as shown in the diagram, then fold the baffle ② and send it into the tank ④ through the joint pipe ③ to flatten it out. Then place the fixed plate disc at the center of the joint pipe flange, press the electrostatic grounding wire ⑤ gasket under the connecting bolt of the breathing valve, and reinstall the breathing valve.
1. The breathing valve baffle is lifted below the joint pipe between the breathing valve and the oil tank to reduce the loss of oil and gas leakage during the large breathing process.
2. Please indicate the name, specifications, and drawing number when placing an order. The actual height of the tank top joint pipe is n.

Main appearance and flange connection dimensions of GHF-1 fire breathing valve

Fire breathing valve specifications	Drawing number	weight	Installation size of fire breathing valve (mm)
		Kg/set)	A	B
DN80	Fc1-80-00	≈2	Ø198	N+constant
DN100	Fc1-100-00	≈3	Ø228	N+constant
DN150	Fc1-150-00	≈5	Ø318	N+constant
DN200	Fc1-200-00	≈8	Ø438	N+constant
DN250	Fc1-250-00	≈11	Ø546	N+constant