Murphy warranty Description, Applications, Basic Operation, OPLH / OPLHACS Series, Warranty

4-1/2 in. (114 mm) Dial

Level Swichgage® instrument

OPLH-94122B

Revised 03-06

Catalog Section 15

OPLH / OPLHACS Series

R

Selected configurations

are third party listed. Consult FWMurphy for details.

■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

OPLHACS

OPLHFC

■ Indication only Murphygage® instrument Available

■ Latching Control Relay Versions Available

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.

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

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		Adjustment
	C	Knob
steel rotary
		B
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

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