Heater Outlet Check Valve

Detailed product information

The inlet valve is used in conjunction with a check valve. After filling the high-pressure heater with water, as the water pressure increases, when the pressure reaches a certain level, the pressure difference across the cross-section of the inlet valve stem causes the stem to move upward, lifting the valve and opening the channel for water to enter the high-pressure heater, after which the heater is put into operation. In the event of a heater failure (pipe system rupture) and exceeding the permissible water level in the heater, a level signal through an electrical device opens a quick-acting shut-off valve. Condensate enters the upper piston chamber of the inlet valve, lowering the piston, which moves the valve down, closing the inlet to the high-pressure heater and opening the bypass, resulting in the heater being taken out of operation. The full response time is 2 seconds.

Product parameters

♦Product standards: JB/T 3595, NB/T 47044, ASME B16.34

♦ Nominal pressure: PN16-PN420 (900LB-2500LB)

♦ Nominal diameter: DN100-DN350 (4“-14”)

♦ Body material:

1. WCB, ZG20CrMo, Cr5Mo, ZG20CrMoV

2. 25#, 12Cr1MoV

3. ASTM A216 WCB, ASTM A217 WC6, ASTM A217 WC9

4. ASTM A105, ASTM A182 F11, ASTM A182 F22

Operating temperature

1. WCB: -29℃ to +425℃

2. Alloy steel: from -29°C to +540°C, from -29°C to +570°C

♦ Working media: water, steam, and others

♦ Connection method: flanged, welded

♦ Control method: pneumatic, hydraulic