High pressure bypass hydraulic inlet three-way valve&outlet three-way valve

High pressure heater coupling valve is an automatic protection device equipped with a high-pressure heater to ensure that in the event of leakage or blockage of the drain adjustment valve in the high-pressure heater piping system,the valve automatically closes to supply water to the high-pressure heater piping system and opens the bypass to supply water.As the high-pressure heater needs to cut off the water supply,a set of water side protection valves is designed.The name of the high-pressure heater coupling valve refers to a set of valves,so it is called a coupling valve,which can be divided into inlet coupling valve and outlet coupling valve.High inlet connected valve,also known as water supply three-way valve,is commonly referred to.Three way valves are divided into electric and hydraulic types,and are commonly used for units with a capacity of over 300000 yuan.This is because the outlet valve on the high inlet side is mostly designed as an electric gate valve.High pressure coupling valves are all water pressure valves that rely on water supply as power.When needed,the coupling valve is closed to cut off the water supply,and the coupling valve is connected to the outlet of the small bypass pipe.The outlet valve is closed under the action of the small bypass incoming water,and at the same time,the feedwater flows to the boiler through the check valve,avoiding the boiler from cutting off water and protecting the high-pressure heater.The design of this valve is quite unique,consisting of an upper valve seat and a lower valve seat.When the valve is opened to allow water to enter the high-pressure heater,the valve core contacts and seals with the upper valve seat,ensuring that the water does not pass through a small bypass;When the valve is closed and the feedwater enters the boiler through a small bypass,the valve core contacts and seals with the lower valve seat to ensure that the high-pressure heater can be disconnected and repaired.
The high-pressure heater protection valve is used in the high-pressure heater feedwater protection system to quickly cut off the high-pressure heater feedwater in the event of a malfunction or other reasons,causing the high-pressure heater to disconnect and the feedwater to enter the boiler through a bypass,thereby protecting the high-pressure heater and ensuring normal operation of the unit.
Electric three-way high pressure coupling protection valve(inlet valve)high pressure coupling valve,with good medium flow line,low flow resistance,and reliable performance.This valve is a three-way valve.The water supply is introduced from the side inlet,and enters the high-pressure heater through the downward outlet.The outlet on the other side is connected to the bypass pipeline.The valve has two sealing surfaces,upper and lower.When the high-pressure heater is operating normally,the valve opens and the valve disc moves up to contact the upper seal,cutting off the bypass.When the high-pressure heater malfunctions or needs to be shut down for other reasons,the valve disc moves down,the valve is closed,and the feedwater enters the boiler directly through the bypass pipeline through the outlet on the other side,without passing through the high-pressure heater,causing the high-pressure heater to disconnect.This valve has two seats,the lower seat is replaceable,and the upper seat is sealed with a sealing ring to ensure normal operation and long-term operation without leakage.The sealing surface is welded with Stellite alloy,which is wear-resistant,abrasion resistant,and has a long service life.The valve stem adopts a special design process to ensure a switch time of 30 seconds.This valve is matched with the outlet valve(electric gate valve)to ensure the safe operation of the high-pressure heater.