HXF4 type flame retardant breathing valve with exhalation connectionDetailed product description：

Characteristics and performance of HXF4 type flame retardant breathing valve with exhalation connection:
The flame retardant breathing valve with exhalation connection is a breathing function installed on the top of a fixed indoor storage tank. It can automatically adjust the pressure difference inside and outside the oil storage tank, and its performance is reliable and stable, fully complying with the SY7511-87 standard of the Ministry of Petroleum Industry.

Scope of application:
The flame retardant breathing valve with exhalation connection is suitable for storing Class A oil products with a flash point below 28 ℃ and Class B oil products with a flash point below 60 ℃, such as gasoline, benzene, kerosene, light diesel, thick oil and other oil products, as well as chemical product storage tanks with the same properties.

HXF4 type flame retardant breathing valve with exhalation connection specification:

model	Operating pressure Pa
A	Positive pressure: 355 Negative pressure: 295
B	Positive pressure: 980 Negative pressure: 295
C	Positive pressure: 1765 Negative pressure: 295

Maintenance and Care

1. Check whether the pressure valve disc and vacuum valve disc are flexible in action, and whether the guide rod and valve sealing ring are damaged in contact.
2. When reinstalling the pressure plate and vacuum plate, ensure that the contact surface is tight and the guide rod can be raised and lowered flexibly.
3. When activating a new fire-resistant breathing valve, the shock-absorbing material on the disc must be removed.