Ashcroft B400 설치 및 유지 관리 지침

{카테고리_이름} Ashcroft B400에 대한 설치 및 유지 관리 지침을 온라인으로 검색하거나 PDF를 다운로드하세요. Ashcroft B400 2 페이지. Snap action switches for pressure control

페이지 인쇄

Installation and Maintenance Instructions for

B400 & B700 ASHCROFT

Switches for Pressure Control

B400 DIMENSIONS

4.00

101.6

3.31

84.1

6.46

164

1.38

.50

35.2

12.7

2.78

70.6

3.50

88.9

Ø 5.12

STANDARD RANGES

130

10, 30, 60, 100, 150 ˝H

15˝H

O vac.-15˝H

B700 DIMENSIONS

5.20

Ø 0.28 x 3 HOLES

(132)

(7)

3.62

1.37

(92)

(35)

6.43

163

1.11

4.37

(28)

(111)

1.39

(35)

0.36

(9)

0.50

2.78

(13)

(71)

3.50

(89)

Ø 5.12

(130)

INTRODUCTION

The Ashcroft pressure switch is a precision built agency

approved control device which features a mechanical snap

action switch. Controllers are available for operation on pres-

sure or vacuum with fixed or variable differential. Also manual

reset types for operation on increasing or decreasing pressure.

The manual reset types remain tripped until reset by pressing a

button on top of the enclosure. Standard electrical switch is

SPDT, available with various electrical characteristics. Two

SPDT switch elements mounted together are available except

on variable Deadband and manual reset types. Various wetted

material constructions for compatibility with a range of pressure

media may be obtained.

The Ashcroft snap action pressure switch is furnished in the

standard NEMA 4 and explosion-proof NEMA 7 & 9 enclosure

styles. Both enclosures are epoxy coated aluminum castings.

INSTALLATION

These controls are precision instruments and should never be

All sales subject to standard terms and conditions of sale. I&M009-10008-10/00 (250-2246E) 06/15

Snap Action

2.55

64.9

Ø .28

7.1

X3 HOLES

2.75

3/4 NPT

69.9

FEMALE

3.25

82.6

Ø .34

8.6

X2 HOLES

1/4 NPT

FEMALE

3.19

81.1

5.75

146.1

BRACKET WHEN

"XBP" VARIATION

REQUIRED

2.7 lb

(1.2 kg)

3.58

(91)

2.18

1.22 (31)

(55)

0.32

(8)

Ø 3.90

(99)

1.93

(49)

3/4 NPT

2 HOLES

Ø 0.34 X 2 HOLES

(9)

0.36

(9)

5.62

(143)

1/4 NPT FEMALE

1.25

31.8

.25

6.4

5.11

129.8

3.86

97.9

1/4 NPT

FEMALE

STANDARD RANGES

15, 30, 60, 100, 200, 400, 600 psi

1000, 3000 psi

30˝Hg vac.-0

Ø 0.28 x 3 HOLES

(7)

0.03

(1)

3.62

(92)

5.73

(146)

0.31 (8)

1.37

(35)

3.06

(78)

BRACKET WHEN

REQUIRED "XBP"

VARIATION

left with internal components exposed. During installation insure

that covers are in place and conduit openings are closed except

when actually working on the control.

MOUNTING B400 AND B700 SERIES

Three holes external to the enclosure for surface mounting.

Location of these holes is shown on the general dimension draw-

ing. They may also be mounted directly on pressure line using

the pressure connection. When tightening control to pressure

line, always use the wrench flats or hex on the lower housing.

ELECTRICAL CONNECTIONS

Remove cover

B400 Series – two screws hold cover to enclosure

B700 Series – cover unscrews

CONDUIT CONNECTIONS

Note – It is recommended that Teflon tape or other sealant be

used on conduit, bushing or plug threads to ensure integrity of

the enclosure.

4.00

2.55

101.6

64.9

2.75

3.31

69.9

84.1

Ø .28

7.1

X3 HOLES

Ø 2.31

58.7

3.25

82.6

(.81 kg)

3.58

5.20

(91)

(132)

2.18

(55)

0.32

(8)

Ø 3.90

(99)

3/4 NPT 2 HOLES

1.93

(49)

1/4 NPT FEMALE

4.37

(111)

1.25

31.8

.25

6.4

3/4 NPT

FEMALE

2.51

63.8

1.8 lb

1.22

(31)

0.03

(1)

0.31

(8)

2.31

(59)

2.7 lb

(1.2 kg)