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H48Y/H Empty Drain Check Valve

Product overview

Product model: H48Y (H)
Nominal diameter: DN50 ~ 250mm
Nominal pressure: PN20MPa
Operating temperature: ≤160℃
Design and Manufacture: ASME B16.34, JB/T3595, E101
Pressure and temperature: ANSI B1 6.34, JB/T74, JB/T3595, E101
Structure length: ANSI B16.10, E101, GB/T15188.1, JB/T2766
Butt welding connection size: ASME B16.25, GB/T12224, E101
Inspection and test: ISO5208, GB/T13927, JB/T3595

H48Y/H Empty Drain Check Valve product details

H48Y/H Empty Drain Check Valve overview

H48Y/H Empty Drain Check Valve produced and sold by Baigang valve group installed in the thermal power unit to the large pump outlet pipe to prevent water back to protect the pump. The valve with the minimum flow pump automatically recirculation next to the valve work, when the pump in the low load or outlet cut-off state, the automatic recirculation bypass valve should be in the open position to ensure the safe operation of the pump. When empty check valve opens, the recirculation bypass valve closes automatically. Should not be used for containing solid particles and larger viscosity media.

H48Y/H Empty Drain Check Valve structure features

As a principle: Open the outlet valve, start the pump, water reaches a certain pressure, the valve pressure in the water under the role of a certain height, pushed off the valve seat, the water that is out. At the same time due to the valve flap rise, drive connecting rod rotation, toggle the exhaust port valve, the recirculation blade valve to move down, close the exhaust port. When the water flow decreases, the valve flap down, push the connecting rod to open the emptying valve, open the recycling door to maintain the pump's minimum allowable flow. When the pump is stopped, the valve flap will automatically fall off and the valve port passage will be closed to prevent the damage of the high pressure water hammer water supply system.

Structural features: The valve with the recycling bypass valve work to maintain the safe operation of the system. The main valve flap moves up and down. When the media is flowing backwards, the bypass valve is closed by means of medium pressure and spring. At this time, the bypass valve is opened. When the main valve flap is fully open, the bypass valve is closed. Valve seal made of stainless steel surfacing, wear-resistant, abrasion resistance, reliable sealing. The valve should be installed vertically.

H48Y/H Empty Drain Check Valve main parts and materials　

Part Name	material
Body, connecting flange, exhaust flange, flange cover	Carbon steel
Shaft, fork, sleeve, slider, exhaust sleeve, exhaust disc	stainless steel
Valve, valve body, valve shaft, connecting fork	High-quality carbon steel
bushing	Cast aluminum bronze
Bolts and nuts	High-quality carbon steel

H48Y/H Empty Drain Check Valve main connection size　

DN	L	D	D1	D2	D6	b	Zd	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

Reminder:

All text, data and pictures in this article are for reference only.To see more details of the H48Y/H Empty Drain Check Valve performance parameters, structural dimension parameters, pricing, etc., or to request high quality printing samples, please Contact us.

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