Chase breathing gas supply manhole HXF-HR

Breathing manhole, Fire breathing manhole is installed in a safe emergency ventilation devices tank top, usually with Fire breathing valve supporting the use, when to avoid accidents caused since a sharp overpressure or vacuum tank, the tank and damage accidents, but also play a role in fire safety, safety devices to protect the tank, especially for materials storage vault atmospheric nitrogen tank cap. With a constant pressure discharge, constant pressure inhalation, opening and closing a flexible, safe fire retardant, compact structure, good sealing performance, safety and reliability. Respiratory manhole (HXF-HR type) Ordering data and scope: Model Specifications: HXF-HR (Z) DN450-DN750 (18 "-30") material requirements: housing, the valve disc stem, seat and dust cover , reference materials can be breathing valve series detailed parameters operating pressure: -295Pa / + 98000pa (-30mmH2O / + 10000mmH2O) Connection: flange connection flange standards and pressure levels: HG, GB is a common standard, PN6, PN10, PN16 Common respiratory valve flange pressure rating. Hint: the installation should pay attention to the flatness of the flange surface, this will reduce the waste tank gas emissions.