Ashcroft GD - Differential Pressure Switches Manual de usuario descargar pdf

Installation and Maintenance Instructions

for ASHCROFT

G-Series Snap Action

Switches for Differential Pressure Control

OPERATION

The ASHCROFT

differential pressure control is a precision

device which features a snap action switch. Fixed deadband is

available with single or dual SPDT independently adjustable

switches with various electrical ratings. Adjustable deadband is

vailable with a SPOT switch with various electrical ratings.

Several wetted material constructions for compatibility with

pressure media may be obtained.

Series GD-S switches have a fixed deadband which will be

within the limits noted on the nameplate.

Series GD-D switches may be set to operate simultaneously

or up to 85 percent of the range apart.The dead band of each

witch will be within the limits noted on the nameplate.

Ser

ies GD-A switches may be set to operate with any dead-

band within the limits shown on the nameplate.

MOUNTING

The “G” Series ASHCROFT

snap action differential pressure

switch has a NEMA-4X enclosure made of 316 stainless steel.

Two holes in the bracket supplied are used to surface mount

the control. Location of these holes is shown on the general

dimension dr

wings. An optional pipe mounting bracket is also

available.Mount on a vibration free surface or pipe in any

orientation.

PRESSURE CONNECTIONS

For operation as a differential pressure control – connect

the high pressure to the side port marked “H” and the low

pressure to the side port marked “L.”

CONDUIT CONNECTIONS

One

⁄

4 NPSM conduit adapter of 316 stainless steel is provided.

It is recommended that Teflon tape or other sealant be used on

conduit bushing or plug threads to ensure integrity of the

enclosure.

ELECTRICAL CONNECTION

Remo

e co

, held in place by four screws.

On all units e

xcept one with ter

minal blocks – wire directly to

the switch according to circuit requirements. Units with terminal

blocks – wire directly to terminal blocks as required.Terminals

are marked common (C), normally open (NO) and normally

closed (NC).

STANDARD RANGES

30, 60, 90, 200, 400 psid

4.6 lbs. (2.1kg)

1 2 3

LEFT SWITCH

TERMINAL BLOCK

RIGHT SWITCH

TERMINAL BLOCK

SERVICE LEADSTOTHESE TERMINALS

5.68

(144)

.38

(10)

.17

(106)

5.61

(142)

.10

(53)

1.60

(41)

.93

(49)

3.48

(88)

0.15

(

.78

(121)

2.64

(

67)

0.25

(6)

2.50

(64)

2 . 31

(5 9)

1 /4NPT

LOW

70A2113 G Series D.P., psid

PORT

FEMALE

PRESSURE

1/4 NPT

ORT

FEMALE

RESSURE

HIGH

3/4 NPT FEMALE

ONDUIT ADAPTER

All sales subject to standard terms and conditions of sale. I&M009/10020-10/00 (250-2892) AMR 12/07

1 2

G-Series Snap Action 1

Indice de contenidos

Pagina 1 - G-Series Snap Action

Installation and Maintenance Instructions for ASHCROFT®G-Series Snap Action Switches for Differential Pressure ControlOPERATIONThe ASHCROFT®differenti

Pagina 2

SETPOINT ADJUSTMENTSSetpoints are changed by means of the setpoint adjusters.TheGD-S single switch has one adjuster and the GD-A adjustabledeadband an

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Ashcroft GD - Differential Pressure Switches Manual de usuario

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