Ashcroft B400 pressure switches Manuale Utente
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Installation and Maintenance Instructions for
B400 & B700 ASHCROFT
®
Snap Action
Switches for Pressure Control
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 pressure
or v
acuum with fix
ed 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 but-
ton on top of the enclosure
.
Standard electr
ical s
witch 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 con-
structions 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 epo
xy coated alumin
um castings
.
4
.03
(102)
Ø
0.28X 3 HOLES
(7)
0.22
(6)
3.32
(
84)
3.26
(
83)
5
.95
(151)
1.25
(
32)
0.50
(
13)
0.14
(
4)
1.39
(
35)
2.78
(71)
3.50
(89)
Ø5.12
(130)
Ø
0.34
2 HOLES
0
.36
(9)
0
.25
(6)
2.27
(
58)
1.25
(
32)
2.77
(70)
5.62
(
143)
3.06
(
78)
2
.84
3/4 NPT
1/4 NPT
F
EMALE
BRACKETWHEN
REQURIED“XBP”
VARIATION
(
72)
3.32
(
84)
0
.22
(6)
Ø
0.28 X 3 HOLES
(7)
3.26
(83)
5
.68
(144)
4.03
(
102)
2
.77
(
70)
2
.27
(
58)
0.25
(6)
5.11
(
130)
2
.50
(64)
1.25
(
32)
Ø
2.31
(
59)
3/4 NPT
B400
B700
5
.20
(
132)
3.62
(
92)
2.18
(
55)
0.32
(8)
4.37
(111)
1.37
(35)
Ø0.28x 3 HOLES
(
7)
1.11
(28)
Ø 5.12
(130)
1.93
(49)
2.78
(71)
3.50
(89)
0.36
(9)
1.39
(35)
6
.43
163
0.50
(13)
0.36
(9)
Ø0.34 X 2 HOLES
(9)
Ø3.90
(99)
0.03
(1)
3
.58
(
91)
0.31 (8)
5.62
(143)
3.06
(78)
1.22 (31)
1/4 NPT FEMALE
3/4 NPT
2 HOLES
BRACKETWHEN
REQUIRED "XBP"
VARIATION
1.93
(49)
5
.20
(132)
3.62
(92)
2.18
(55)
0.32
(8)
4.37
(111)
1.37
(35)
5.73
(146)
Ø0.28 x 3 HOLES
(7)
Ø3.90
(99)
0
.03
(
1)
3
.58
(91)
2.31
(59)
0.31
(8)
1
.22
(31)
1/4 NPT FEMALE
3/4 NPT 2 HOLES
1.8 lb
(.81 kg)
2.7 lb
(1.2 kg)
2.7 lb
(1.2 kg)
3.6 lb
(1.6 kg)
STANDARD RANGES
15, 30, 60, 100, 200, 400, 600 psi
1000, 3000 psi
30˝Hg vac.-0
STANDARD RANGES
10, 30, 60, 100, 150 ˝H
2
O
15˝H
2
O vac.-15˝H
2
O
©
2007 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0499, www.ashcroft.com
All sales subject to standard ter
ms and conditions of sale
.
I&M009-10008-10/00 (250-2246E) AMR 12/07
1
2
Sommario
Pagina 1 - Switches for Pressure Control
Installation and Maintenance Instructions for B400 & B700 ASHCROFT®Snap Action Switches for Pressure ControlINTRODUCTIONThe Ashcroft pressure swit
Pagina 2
INSTALLATIONThese controls are precision instruments and should never beleft with internal components exposed. During installation insurethat covers a
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