Slow closing check valve 300X

NegotiableUpdate on 08/14

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

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Overview

Slow closing check valve 300X

Product Details

Slow closing check valve 300X

The 300X slow closing check valve consists of a main valve, a one-way valve, a needle valve, a ball valve, a micro filter, and a pressure gauge to form a hydraulic control connection system. By utilizing hydraulic automatic operation, the main valve can achieve the optimal opening or closing speed. To prevent the occurrence of water hammer and achieve the effect of slow closing and noise reduction.
This product utilizes hydraulic self control, does not require other devices or energy, is easy to maintain, and has smooth opening and slow closing.

This series of valve products is used for water supply network systems in high-rise buildings, living areas, and urban water supply projects.

Working principle
When the valve supplies water from the inlet end, the water enters the main valve control room through a micro filter, needle valve, and one-way valve, and then drains downstream through a ball valve. Because the opening of the needle valve is smaller than that of the ball valve, that is, the drainage speed of the main valve control room is greater than the inlet speed, the pressure in the control room decreases, and the inlet pressure acting on the lower end of the main valve disc opens the main valve to supply water downstream.
When the pipeline stops supplying water, if the downstream water starts to flow back, a portion of the return water enters the main control room through the ball valve. Due to the action of the one-way valve, the return water cannot flow out of the main control room, causing the main control room to gradually increase pressure and slowly close the main valve.

Main technical parameters

Nominal pressure (Mpa)	Shell test pressure (MPa)	Sealing test pressure (MPa)	Applicable Medium	Medium temperature (℃)
1.0	1.5	1.1	water	0-80
1.6	2.4	1.76
2.5	3.75	2.75

Material for main parts

Part name	Part Material
Valve body and valve cover	WCB
Valve seat disc	copper alloy
Sealing ring O-ring	Nitrile rubber
valve stem	2Cr13
spring	50CrVA
Needle Valve	copper alloy
ball valve	copper alloy
float valve	copper alloy
micro filter	stainless steel

Part List
1. Needle valve 2, main valve 3, ball valve 4, pressure gauge 5, one-way valve

Main external connection dimensions

DN	L	A	A1	H	H1	F	D mm			D1 mm			D2 mm			n-Φd
DN	mm	mm	mm	mm	mm	mm	PN1.0	PN1.6	PN2.5	PN1.0	PN1.6	PN2.5	PN1.0	PN1.6	PN2.5	PN1.0	PN1.6	PN2.5
20	180	282	200	172	106	116	105	105	105	75	75	75	58	58	56	4-13.5	4-13.5	4-14
25	180	282	200	172	106	116	115	115	115	85	85	85	68	68	65	4-13.5	4-13.5	4-14
32	180	282	200	172	106	116	140	140	140	100	100	100	78	78	76	4-17.5	4-17.5	4-18
40	240	320	210	265	210	170	150	150	150	110	110	110	88	88	84	4-17.5	4-17.5	4-18
50	240	320	210	265	210	170	165	165	165	125	125	125	102	102	99	4-17.5	4-17.5	4-18
65	250	330	215	310	215	180	185	185	185	145	145	145	122	122	118	4-17.5	4-17.5	8-18
80	285	350	220	350	245	210	200	200	200	160	160	160	133	133	132	8-17.5	8-17.5	8-18
100	360	410	230	460	305	275	220	220	235	180	180	190	158	158	156	8-17.5	8-17.5	8-22
125	400	420	245	520	365	310	250	250	270	210	210	220	184	184	184	8-17.5	8-17.5	8-26
150	455	430	260	570	415	355	285	285	300	240	240	250	212	212	211	8-22	8-22	8-26
200	585	440	280	695	510	460	340	340	360	295	295	310	268	268	274	8-22	12-22	12-26
250	650	450	300	780	560	500	395	405	425	350	355	370	320	320	330	12-22	12-26	12-30
300	800	460	320	902	658	580	445	460	485	400	410	430	370	370	389	12-22	12-26	16-30
350	860	470	340	1025	696	640	505	520	555	460	470	490	430	430	448	16-22	16-26	16-33
400	960	480	360	1080	735	715	565	580	620	515	525	550	482	482	503	16-26	16-30	16-36
450	1075	530	395	1030	610	780	615	640	670	565	585	600	532	550	548	20-26	20-30	20-36
500	1075	580	420	1135	665	830	670	715	730	620	650	660	585	585	609	20-26	20-33	20-36
600	1230	600	445	1270	725	920	780	840	845	725	770	770	685	685	720	20-30	20-36	20-39
700	1650	730	495	1460	865	980	895	910	960	840	840	875	800	800	820	24-30	24-36	24-42
800	1750	830	530	1640	925	1050	1015	1025	1085	950	950	990	905	905	928	24-33	24-39	24-48