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Gas water heater valves Technical Overview
2015-01-15 by bridge
The main component of LNG is methane, a small amount of ethane, propane, and other components having a boiling point of -162 ℃, a melting point of -182 ℃, flash point 650 ℃. LNG small molecular weight, low viscosity, permeability, easy to leakage and diffusion, in its production, reception, transportation and gasification devices, cryogenic Gas Water Heater Valves have an extremely important role for its safe and reliable operation of the system.
Currently, LNG key equipment used in theGas Valve For Water Heater according to the functions are divided into the control gas water heater valve, shut-off gas water heater valves and other gas water heater valve types, which include single-seat control gas water heater valve through the gas water heater valve, multi-stage pressure regulator gas water heater valve, butterfly categories; shut-off gas water heater valves, including gate, globe gas water heater valves, butterfly gas water heater valves and ball five; the other type of gas water heater valve also includes a safety gas water heater valve, vacuum gas water heater valves and thermal release gas water heater valve. LNG from the gas water heater valve means cut off an important, non-return, regulation, and role, and its normal operating temperature of about -163 ℃, and therefore the gas water heater valve design, in addition to following the general design principles gas water heater valve, also need to meet at cryogenic conditions and lower explosive media safe, reliable sealing, switches and flexible requirements. heater valves body material should not produce low brittle fracture, while also resistant to corrosive media, and the organizational structure of the material should be stable to prevent the phase change material changes caused by volume. When welded structure, you should select a good welding performance and reliability of the weld material at low temperatures. Seal between the gas water heater valve stem and the general structure of the stuffing box seal or bellows seal structure. gas water heater valve flange sealing and flange gas patio heater valve of the external connection, using the pads must be at room temperature, with reliable sealing and resilience at low temperatures and temperature changes.
Currently, LNG key equipment used in theGas Valve For Water Heater according to the functions are divided into the control gas water heater valve, shut-off gas water heater valves and other gas water heater valve types, which include single-seat control gas water heater valve through the gas water heater valve, multi-stage pressure regulator gas water heater valve, butterfly categories; shut-off gas water heater valves, including gate, globe gas water heater valves, butterfly gas water heater valves and ball five; the other type of gas water heater valve also includes a safety gas water heater valve, vacuum gas water heater valves and thermal release gas water heater valve. LNG from the gas water heater valve means cut off an important, non-return, regulation, and role, and its normal operating temperature of about -163 ℃, and therefore the gas water heater valve design, in addition to following the general design principles gas water heater valve, also need to meet at cryogenic conditions and lower explosive media safe, reliable sealing, switches and flexible requirements. heater valves body material should not produce low brittle fracture, while also resistant to corrosive media, and the organizational structure of the material should be stable to prevent the phase change material changes caused by volume. When welded structure, you should select a good welding performance and reliability of the weld material at low temperatures. Seal between the gas water heater valve stem and the general structure of the stuffing box seal or bellows seal structure. gas water heater valve flange sealing and flange gas patio heater valve of the external connection, using the pads must be at room temperature, with reliable sealing and resilience at low temperatures and temperature changes.
keywords: Gas Water Heater Valve