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Murphy Level Swichgage Instrument OPLH Owner's Manual

Murphy Level Swichgage Instrument OPLH Owner's Manual

4-1/2 in. (114 mm) dial level swichgage instrument

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4-1/2 in. (114 mm) Dial
Level Swichgage
R
Selected configurations
are third party listed. Consult
FWMurphy for details.
OPLHFC
Description
The OPLHC/OPLHACS Series Level
Swichgage instruments are combination
level indicating gages with adjustable low
and high limit switches. Limit switches can
be wired directly to electric pilot circuits to
operate alarms, shutdown or start/stop
pumps to maintain predetermined levels.
Surface mount or panel mount enclosure is
available for both model series. All models
feature a 4-1/2 in. (114 mm) dial for easy
viewing. Adjustable limit switches are
accessible from front of the Swichgage
instrument.
Specialized models are available for specific
applications involving engines or electric
motors.
OPLHC/OPLHACS
Series Swichgage instruments
include 2-adjustable, pilot duty, pointer type
contacts. Contacts have self-cleaning motion
to enhance electrical continuity. Models are
available with a rugged bourdon-tube or 316
stainless steel bellows sensing element for
greater accuracy and sensitivity in lower
ranges.
®
instrument
OPLH / OPLHACS Series
Combination Level Indicating Gage and
Critical Level Limit Switch
High and Low Level Limit Contacts Are
Visible and Adjustable
Designed to Start and Stop Pumps to
Maintain Specific Levels
Indication only Murphygage
OPLHACS
Available
Latching Control Relay Versions Available
A "freeze-proof" sensor of 316 stainless steel
with Buna-N rolling diaphragm, is available.
The "freeze-proof" sensor (OPLHAFP)
inserts approx., 2 in. (52 mm) inside a tank.
OPLHBP/OPLHABPS
Internal latching control relays are available
to provide ON/OFF automation for electric
motor applications.
OPLHC and OPLHACS series are avail-
able in indication only Murphygage models
(OPLHAGS). See Page 2 to determine the
model for your application.
Applications
Saltwater Disposal Systems
Waterflood Systems
Diesel Day Tanks
Oil Storage Tanks
OPLH-94122B page 1 of 4
Catalog Section 15
®
instrument

Basic Operation

The OPLHC/OPLHACS series operate from
static head pressure. Pressure is transmitted
to the process connection of the Swichgage
instrument.
From here the pressure flexes the bourdon
tube or operates the 316 stainless steel bel-
lows (depending on which model you have).
The bourdon tube/bellows oper-
ates the stainless
C
steel rotary
geared movement
which in turn operates
the indicating pointer on
A
the face of the dial. When
the pointer (A) closes with the
limit contact (B), a control circuit
(C) is completed and signals an alarm and/or
shutdown or starts/stops a pump.
Warranty
A limited warranty on materials and workmanship
is given with this FW Murphy product. A copy of
the warranty may be viewed or printed by going to
www.fwmurphy.com/support/warranty.htm
OPLH-94122B
Revised 03-06
Adjustment
Knob
B

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Summary of Contents for Murphy Level Swichgage Instrument OPLH

  • Page 1: Basic Operation

    (C) is completed and signals an alarm and/or shutdown or starts/stops a pump. Warranty A limited warranty on materials and workmanship is given with this FW Murphy product. A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm...
  • Page 2: Specifications

    Enclosure Type (die cast aluminum) • Surface mount, square case • Panel mount, round case • Panel mount, square case Limit Switch Ratings • Pointer Contacts: SPDT center off; 2 A, 30 VDC, 1 A, 125 VAC. Latching Control Relay •...
  • Page 3: Typical Applications

    Surface / Panel Mount Enclosure (Square Case) 4-1/32 in. (102 mm) Mounting Holes 9/32 in. (7 mm) diameter 3 places. Not available on panel mount square case. Panel Mount Enclosure (Round Case) 5-7/16 in. (138 mm) 1/4 in. (6 mm) dia. holes (3 places.) on 5-13/64 in.
  • Page 4: How To Order

    MURPHY, the Murphy logo, Swichgage and/or common law trademarks of Murphy Industries, Inc. This document, including textual matter and illustra- tions, is copyright protected by Murphy Industries, Inc., with all rights reserved. (c) 2006 Murphy Industries, Inc. OPLH-94122B page 4 of 4...

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Level swichgage instrument oplhacsSwichgage oplhacs seriesSwichgage oplh series