H48h Flanged Feed Water Pump Extraction Piston Check Valve

• Media: Wog
• Temperature: High Temperature
• Material: Wcb, Wc6, Wc9, 12crmo, 12crmov, 15CrMo, 15crmov
• Connection Form: Welding
• Structure: Piston
• Pressure: High Pressure
• Model NO.: H48H
• Function: Non Return
• Sealing Form: Self Tight Pressure Sealing
• Flow Direction: Unidirection
• Standard: ANSI
• Application: Industrial Usage, Water Industrial Usage
• Transport Package: Plywood Case
• Trademark: GOOLE, OEM, ODM
• Origin: China(Mainland)
• HS Code: 8481804090
• Production Capacity: 10000PCS/Year

Product Description

H48h Flanged Feed Water Pump Extraction Piston Check Valve

Product Description

H48h Flanged Feed Water Pump Extraction Piston Check Valve
The exhaust /Extraction check valve is installed on the high pressure feed water pump outlet pipeline of the thermal power unit to prevent backflow of the feed water and protect the feed water pump. The valve cooperates with the pump's small flow to automatically re-circulate the side valve. When the feed pump is at a low load or the exit door is closed, the automatic recirculation bypass valve should be in the open position to ensure the safe operation of the pump. When the empty exhaust check valve opens, the recirculation bypass valve closes automatically. It should not be used for media containing solid particles and high viscosity.

H48h Flanged Feed Water Pump Extraction Piston Check Valve
Detailed introduction
It's Installed on the high-pressure feed water pump outlet pipeline of the thermal power unit to prevent reverse flow of feed water and protect the feed pump. This valve cooperates with the pump's small flow automatic recirculation side valve work, when the feed water pump is in the low load or exit door closed state, automatic recirculation The bypass valve should be in the open position to ensure the safe operation of the pump. When the empty exhaust check valve is opened, the recirculation bypass valve is automatically closed.

Specification

H48h Flanged Feed Water Pump Extraction Piston Check Valve
principle and structural characteristics

1. Working principle: Open the outlet valve and start the feed pump. After the feedwater reaches a certain pressure, the valve disc will rise to a certain height under the action of the feedwater pressure. Pushing the valve seat will cause the water to flow out. At the same time, due to the rise of the valve disc, The connecting rod rotates, and the discharge valve piece is toggled to move the recirculating blade valve downward and close the emptying port. When the flow of the water supply decreases, the valve disc falls, pushing the connecting rod to open the emptying valve piece, and then opening it again. The circulating valve maintains a small allowable flow rate of the pump. When the pump is stopped, the valve flap automatically falls and closes the valve port passage to prevent the destruction of the high pressure water hammer water supply system.
2, structural features:
A. The air exhaust check valve cooperates with the recycle bypass valve to maintain the safe operation of the system.
B. When the main valve flap moves up and down and the medium flows backward, the channel is closed by means of the medium pressure and the action of the spring. At this time, the bypass valve is opened. When the main valve flap is fully opened, the bypass valve is closed.
C. The valve flap seal is made of stainless steel surfacing. It is wear-resisting, has strong anti-scratch and reliable sealing.

D,H48H Cast Type Flanged Steam Turbine Extraction Non Return Valve should be installed vertically.

Product Details

 

Part Name	Material
Valve body, connecting flange, exhaust flange, flange cover	Carbon cast steel
Guide shaft, fork, shaft sleeve, slider, discharge sleeve, exhaust disc	Stainless steel
Valve disc, valve disc body, valve disc shaft, connecting fork	High quality carbon steel
bushing	Cast aluminum bronze
Bolts and nuts	High quality carbon steel

DN	L	D	D1	D2	D6	b	Z-d	f	f2	H	Weight(kg)
100	430	360	292	245	138	66	8-41	3	6	630	285
150	550	440	360	305	190	82	12-Ф48	3	6	650	510
175	610	475	3944	340	214	84	12-Ф48	3	6	685	700
225	900	580	483	418	268	100	12-Ф58	3	6	765	1105
250	900	670	572	508	319	110	16-Ф58	3	6	780	1330

Product Parameters

Nominal pressure PN(MPa)	Test pressure Ps(MPa)	Working pressure (MPa)	Apply	Working temperature(ºC)
Strength test	Sealing test	medium
20.O	30.O	22.O	20.0	Water	≤160

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