Engineering Cases

Forged steel high-pressure three-way valve

This valve is used in high pressure heater isolation system When the high pressure heater fails due to its normal operation, an isolation system needs to be set up

Classification:

Valve products

Classic Case

Case description

Application

This valve is used in high pressure heater isolation system. When the high pressure heater fails due to its normal operation, an isolation system needs to be set up. The isolation system can make the high pressure heater unaligned and feed water bypass, so as to protect the high pressure heater and make the unit run normally.

According to customer requirements, the isolation system can choose two kinds of valve combination scheme: inlet electric three-way valve and outlet gate valve combination structure, inlet three-way valve and outlet three-way valve combination structure. Valve through denso actuator operation to achieve the main and bypass switch, denso actuator brand can be selected according to user requirements.

Characteristic

• The valve body can be cast and forged materials, forged three-way valve for "Z" type structure, cast three-way valve for "T" type structure;

• The valve seat on the entrance three-way valve adopts self-sealing structure, using metal self-sealing ring, high temperature and high pressure resistance, reliable sealing;

• The inlet and outlet valve is controlled by the electric device at the same time to open and close the valve, the action is reliable.

Design Guides

Design and manufacture	Pressure and temperature reference	Inspection and test
NB/ T47044	NB/ T47044	NB/ T47044
ASME B16.34	ASME B16.34	ASME B16.34 、MSS-SP-61

Product Range

Nominal pressure	PN200～PN500（Class1500—Class2500）
Nominal size	DN125～DN350（NPS 5～NPS 14）
Body matenal	20、A105、F36 CL.2、WCB
Test pressure(MPa)	Strength test (Water pressure)	1.5×P(38℃ pressure rating)
	Sealing test (Water pressure)	1.1×P(38℃ pressure rating)
Applicable Temperature	-29℃～425℃
Applicable medium	Steam, water

Note：

1、The valve beyond the above specifications can be customized according to user requirements;

2、The applicable temperature range of each valve shall be subject to the actual pressure bearing material of the valve.

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