Wafer Check Valve

User Manual: Wafer Check Valve

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CHECK
VALVES

FM455 Wafer
PN25
Ductile Iron Wafer Check valve
Check valves permit flow in one direction only, and close automatically if
flow reverses. They are entirely automatic in operation,
depending upon pressure and velocity of flow within the pipeline to
perform their opening and closing functions.
The FM455 is a Double Door wafer pattern valve, spring loaded to assist
closing, and with an EPDM seat for quiet operation.

Materials
PART

MATERIAL

Body

Ductile Iron - BS EN 1561 EN-JL1030

Discs

Stainless Steel SS316

Shaft

Stainless Steel 10088-1 X10CrNil8-10

Stop Pin

Stainless Steel 10088-1 X10CrNil8-10

Seat

EPDM

Springs

Stainless Steel 10088-1 X10CrNil8-10

FM455

Dimensional Drawing

Dimensions and Weights
SIZE

WEIGHT
(kg)

A
(mm)

B
(mm)

C
(mm)

D
(mm)

50

2.5

105

65

3.5

124

54

8

60

54

14

80

4.5

137

73

57

16

89

100

8.0

168

64

25

114

125

10.0

194

70

34

141

150

13.0

222

76

43

168

200

28.0

276

95

61

219

250

45.0

340

108

80

273

300

68.0

400

143

102

324

Pressure/Temperature Ratings
TEMPERATURE (°C)
PRESSURE (BAR)

-10 to 120
25

SPECIFICATION:
Face to Face dimensions conform to BS EN 558-1. Suitable for fitting between flanges conforming to BS EN 1092-2 PN25
Suitable for mounting in horizontal and vertical pipelines.
When installed in vertical pipelines the flow must be in an upward direction.
This valve is suitable for use on group 2 liquids only as defined by the pressure equipment directive and 97/23/EC.
Temperature operating range: -10 to 120°C.

Every effort has been made to ensure that the information contained in this publication is accurate at the time of publishing. Crane Ltd assumes no responsibility or liability for typographical errors or omissions or for
any misinterpretation of the information within the publication and reserves the right to change without notice.

42

TECHNICAL HELPLINE: +44 (0)1473 277400
www.cranefs.com
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