JD745XThe multi-function water pump control valve is mainly used in the direct water supply and drainage system of industrial and mining enterprises and high-rise buildings by water pump. It has four functions: stop valve, check valve, electric valve and water hammer eliminator. It is especially suitable for supporting automatic control system. It does not need electrical control cabinet and external power. It can automatically open and close according to the conventional way. It has three functions of quick closing, slow closing and energy absorbing cavity to prevent and eliminate water hammer. It can effectively improve the safety and reliability of the system and meet the requirements of automatic control of system engineering equipment. JD745X is composed of main valve, regulating valve and connecting pipe system. The valve body adopts DC valve body. The main valve control room is of diaphragm type or piston type double control chamber structure. The control room is more than the general hydraulic control valve. The control function of the main valve is increased, and the slow opening and closing of the water pump outlet is realized.
It is mainly used in high-rise building water supply system and other water supply system pump outlet pipeline to prevent and weaken water hammer and water hammer of pipeline when pump is opened and closed, prevent water backflow, protect water pump and maintain pipeline safety.

 

Design Code: QB / t219
Structure length: QB / t219
Test and inspection: GB / t13927
Flange connection: JB / t79, gb9112-9131, hg20592, sh3406, ANSI B16.5
Product identification: GB / T 12220
Supply specification: JB / T 7928

Nominal pressure(Mpa)	Shell test pressure(MPa)	Sealing test pressure(MPa)	Slow closing time (s)	Minimum operating pressure(MPa)	Applicable media	Medium temperature(℃)
1.0	1.5	1.1	3-60 (Adjustable)	≥0.07	水	0-80
1.6	2.4	1.76
2.5	3.75	2.75

 

Part name	Parts material
Body bonnet	HT200、QT350、WCB
Seat disc	copper alloy/2Cr13
Sealing ring O-ring	Nitrile rubber
Stem	2Cr13
Spring	50CrVA
Cylinder liner piston (piston type)	2Cr13
Diaphragm (diaphragm type)	Fabric sandwiched nitrile rubber
Control valve ball valve	copper alloy
filter	stainless steel

DN	50	65	80	100	125	150	200	250	300	350	400	450	500	600
L	205	216	250	320	365	415	500	605	698	787	914	978	978	1150
H	293	328	364	418	481	543	673	729	927	957	1188	1218	1256	1600