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H77 Wafer type check valve

Release Date: November 21, 2015

H77 Wafer Type Check Valve Overview

Check valve

H77 Wafer type check valve is used in pipeline system. Its main function is to prevent the medium from flowing backward, prevent the pump and its driving motor from reversing, and release the medium in the container. Non-return valves can also be used to supply lines to auxiliary systems whose pressure may rise above the pressure of the main system. The check valve can be applied to the pipeline of various media according to the different materials. The check valve is installed on the pipeline, which becomes one of the fluid components of this complete pipeline. The flap opening and closing process is affected by the transient flow state of the system in which it is located. In turn, the closing characteristics of the flap Has an effect on the state of fluid flow.

Main technical parameters of H77 Wafer type check valve

model

Nominal pressure

Test pressure PS (MPa)

Operating temperature
(℃)

Applicable medium

PN (MPa)

case

seal

1Jl77X
LJH77H
LJH77Y
LJll77W

1.0

1.5

1.1

Soft seal:
100 ~ 225
Hard seal
200 ~ 550

water,
Oil products,
gas,
Nitric acid, etc.

1.6

2.4

1.76

2.5

3.75

2.75

1.0

6.0

4.4

6.4

9.6

7.0

Material of main parts of H77 Wafer type check valve

Part Name

material

LJH77X-10C, 25 16, 40

LJH77H-16C, 40 25, 64

IJH77Y25I 40I164I

LJH77W10C, 25 16C, 40

LJH77W-10P, 25P 16P, 40P

Valve body, butterfly plate

Cast steel WCB

Chrome-molybdenum steel

Cast steel WCB

lCrl8Ni9Ti

Valve stem

2Crl3

lCrl8N19Tl

20r13

Valve body sealing pair

Surfacing alloy steel

Hardfacing

Assist spring

lCrl8N19Ti

Heat resistant alloy

1Crl8Ni9Ti

Main dimensions of H77 Wafer type check valve

Nominal diameter
DN (mm)

L

D2

D3

Nominal diameter
DN (ram)

L

D2

D3

LJH77X

LJH77H
LJH77Y
LJH77W

LJH77X

LJH77H
LJH77Y
LJH77W

50

43

100

43

46

400

140

485

376

390

80

64

1 05

7l

80

d50

152

545

427

427

100

64

155

91 5

94

500

152

608

479

490

125

70

185

115

118

600

178

718

579

588

150

76

210

14l

145

700

229

800

675

686

200

89

265

191

200

800

241

905

774

784

250

114

320

230

250

900

241

1005

875

-

300

114

375

290

300

1000

300

lll5

974

-

350

127

435

340

340

1200

360

1325

1165

-