Restrictor check valve

Technical Parameter

Item model number: LH45X

Nominal diameter: DN50~1000mm

Nominal pressure: PN1.0~2.5MPa

Applicable temperature: 0°C~85°C

Applicable medium: water


Product Detail

Product Description

LH45X current limiting check valve supports the working point of the pump to work in the high-efficiency area, restricts the large flow of the pump, and runs at low efficiency. At the same time, when the pump is stopped by the micro-resistance slow-closing check, it is closed without water hammer phenomenon; it can also prevent the pump from overloading and exceeding the rated value. The current burns out the motor, and there is a stepless adjustment of the head function, which limits the adjustable range of the head to 0.1-0.6MPa, the pressure is set at 0.1MPa, and the temperature of the adjustable medium is between 0-150℃.


The Main Technical Parameters

DN

DN20-DN600

PN

1.0MPa

1.6MPa

2.5MPa

Test pressure

Case

1.5MPa

2.4MPa

3.75MPa

Seal

1.1MPa

1.76MPa

2.75MPa

Proper temperature

0℃~80℃

lower working pressure

P1≥0.07MPa

Structure length standard

Q/BYL

Flange connection standard

GB/T 17241.6

Test pressure standard

GB/T 13927   API 598


限流止回阀(图1)


Main External Connection Dimensions

DN

20

25

32

40

50

65

80

100

125

150

200

250

300

350

400

450

500

600

L

150

160

180

200

203

216

241

270

292

330

400

480

550

622

685

750

811

935

H1

106

106

106

137

137

145

178

232

286

318

413

502

600

638

677

677

750

850