Ashcroft B700 Instruções de instalação e manutenção

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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
O
2
2
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
© 2015 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 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)
O
2
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)