JD745X multifunctional pump control valve

NegotiableUpdate on November 02

Model

Nature of the Manufacturer: Other

Product Category: Water resources system industry

Place of Origin: City, Province

Online Consult Contact Information

Overview

name: JD745X multifunctional pump control valveType: JD745XPresure: 1.0～2.5MPaSpecifications: DN50～DN1000material: Gray iron, ductile iron, carbon steel, etc.

Product Details

Product description
Multifunctional pump control valve from the main valve and control valve and take over the system components, body with DC type valve, the main valve control room for diaphragm or piston type dual structure of the control room, control room than ordinary hydraulic control valve to increase a, an increase of the main valve control function, realized on the pump outlet opened slowly, full, slow closing, closing and other multi-function control, realized a valve, a regulation on the pump outlet multi-function control.
working principle：
When the pump starts, the water pressure acting on the main valve disc below and control room, the pressure to open the main valve, control room on the water through the cavity B slowly discharged to the outlet end, the main valve slowly open. Setting the opening of the regulating valve can be suitable for the opening speed of the landlord valve. When the water pump stops working, the inlet pressure decreased rapidly, in weight, spring pressure quickly shut down most of the opening, to prevent the backflow of water remaining open degree by controlling chamber cavity pressure and water pressure of the lower cavity under the combined action of slowly closed, closing speed slow down the formation of the buffer, to prevent the pressure surge.

Main connection and outline dimensions(PN10)

nominal diameter	Main connection and outline dimensions(mm)
	valve size mm		flange connection size mm
	L	H	D	D1	D2	b	f	Z-Φd
50	203	293	165	125	93	18	3	4-Φ18
65	215	328	185	145	113	18	3	4-Φ18
80	248	364	200	160	128	20	3	8-Φ18
100	283	418	220	180	148	20	3	8-Φ18
125	330	481	250	210	178	22	3	8-Φ18
150	356	543	285	240	204	22	3	8-Φ22
200	444	673	340	295	259	24	3	8-Φ22
250	533	792	395	350	314	26	3	12-Φ22
300	600	927	445	400	362	26	4	12-Φ22
350	622	957	505	460	422	26	4	16-Φ22
400	698	1188	565	515	473	26	4	16-Φ26
450	775	1218	615	565	523	28	4	20-Φ26

Main connection and outline dimensions(PN16)

nominal diameter	Main connection and outline dimensions(mm)
	valve size mm		flange connection size mm
	L	H1	D	D1	D2	b	f	Z-Φd
50	203	293	165	125	93	18	3	4-Φ18
65	215	328	185	145	113	18	3	4-Φ18
80	248	364	200	160	128	20	3	8-Φ18
100	283	418	220	180	148	20	3	8-Φ18
125	330	481	250	210	178	22	3	8-Φ18
150	356	543	285	240	204	22	3	8-Φ22
200	444	673	340	295	259	24	3	12-Φ22
250	533	792	405	355	315	26	3	12-Φ26
300	600	927	460	410	370	28	3	12-Φ26
350	622	957	520	470	428	30	4	16-Φ26
400	698	1188	580	525	479	32	4	16-Φ30
450	775	1218	640	585	539	40	4	20-Φ30

Main parts material

Material code	Valve body, valve cover	The stem	valve seat	Sealing ring	the diaphragm	Spring
Z	HT200 gray cast iron	20Cr13	Gray cast iron	NR/NBR/EPDM/FEP/PFA	NR/NBR/EPDM/FEP/PFA	stainless steel
Q	QT450 nodular cast iron	20Cr13	nodular cast iron
C	WCB carbon steel	20Cr13	carbon steel

Other special materials, our company can also be tailored to customer needs.

Shell material	Shell applicable temperature（℃）	Housing applicable pressure MPa
Gray cast iron（Z type）	≤200	≤1.6
Nodular graphite cast iron（Q type）	≤350	≤4.0
Carbon steel（C type）	≤425	-

Sealing ring / diaphragm	Applicable medium	Applicable temperature（℃）
Natural rubber（NR）	hydrochloric acid, 30% sulfuric acid, 50% hydrofluoric acid, alkali, etc. 50%30% hydrochloric acid, sulfuric acid, hydrofluoric acid, alkali, etc.	≤85
Nitrile rubber （NBR）	Water, oil, waste gas and waste liquid pollution, etc.	≤150
Ethylene propylene rubber （FPDM）	In addition to salt water, 40% boron water, 5%~15% nitric acid and sodium hydroxide, etc..	≤120
Poly (ethylene propylene) plastics（FEP）	In addition to the molten alkali metals, fluorine and aromatic hydrocarbons hydrochloric acid, sulfuric acid, aqua regia, organic acid, strong oxidizing agents, concentrated and dilute acid alternate, alternating alkaline and various organic solvents	≤150
Fusible polytetrafluoroethylene（PFA)		≤180

Nominal pressure PN（MPa）	shell（MPa）	Test pressure（MPa）
Nominal pressure PN（MPa）	shell（MPa）	Seal (liquid)	Seal (gas)
1.0	1.5	1.1	0.6
1.6	2.4	1.76	0.6

Implementation standards
Design specification: JB/T10674
Structure length: JB/T10674, GB/T 12221
Connecting flange: GB/T9113, HG/T20592, HG/T20615, JB/T 79
Experiment and test: GB/T13927, JB/T 9092
Pressure temperature: GB/T 17241.7, GB/T12224
Product identification: GB/T 12220

Valve maintenance
(1) the engineering application of the hydraulic control valve is a manufacturing plant inspection, a variety of complete, technical information to meet the requirements of the product.
(2) the nominal pressure of the valve has different levels, the pipeline transportation of the media, the working pressure should be less than the value of the valve nominal pressure.
(3) the project of the hydraulic control valve setting should have enough space for management, operation, installation and maintenance, and should meet the requirements of the pipeline valve.
(4) when the pipe is connected by flange, the hydraulic control valve with flange connection should be adopted, and the hydraulic control valve with groove connection should be adopted when the pipeline is connected with a groove.
(5) the hydraulic control valve should be set on the one-way flow of media in the pipeline.
(6) the direction of the arrow on the main body of the hydraulic control valve must be consistent with the direction of the pipeline system.
(7) the water control valve should not have gas blocking, air resistance. Automatic exhaust valve should be set at the highest position of the pipe network.
(8) when the valve is installed, the valve cover and valve stem should be facing up. Vertical installation, valve cover, valve stem should be outward.
(9) the valve should be done before the installation of strength and tightness test.