Murphy Engine Throttle Controller AT-67207 Bedienungsanleitung

Description

The AT-67207 is a completely reliable heavy duty device

developed specifically to automatically control engine

speed to meet system demand. Low current, high torque,

solid state switching and electronic clutch make it ideal for

all automatic and semiautomatic engine systems. Used

with the appropriate Murphy SWICHGAGE®, near constant

pressure, level and load can be maintained. Check with our

engineers for help with other applications where speed

control can improve your system.

Applications

Pressure

• City Water Systems.

• Water Flood Injection.

• Sprinkler Lateral Changes.

• Make-up if a “Gang Pump” stops.

• Multiple Hose-reel Irrigation Systems.

Level

• Water or oil storage tanks.

• Waterflood tanks.

• Sewer disposal systems.

• Flood control catch basins.

Temperature

• Multi-engine cooling systems.

• Air conditioned chilled water systems.

Engine load

Empty or fill reservoirs with a lower horsepower engine—

fast when head is high—slow when head is low.

Fully adjustable stepper kit

Meters signal in adjustable pulses. Prevents surging on

critical applications.

Specifications

Voltage: 12 VDC or 24 VDC, positive or

negative ground (specify).

Current: 500 mA(1/2 amp).

Torque: 25 inch pounds.

Sealed limit switches: Factory adjusted, controls maxi-

mum travel.

Linkage adjustment on lever arm—5 holes:

Adjusts travel: 1-3/16 in. (30 mm); 1-11/16 in. (43 mm);

2 in. (51 mm); 2-1/4 in. (57 mm) approximately.

Overall Dimensions: 7 in. (178 mm) D x 6 in. (152 mm) W

x 5 in. (127 mm) H.

Net Weight: 5 lb. (2.27 kg)

AT-7231B

Revised 02-98

Catalog Section 40

(00-02-0099)

Engine Throttle Controller

MURPHYMATIC®AT-67207 •Automatically adjusts

engine speed to meet

demands of: pressure,

level, load and temperature.

•Speed changes made slowly

and smoothly.

•Saves fuel, engine wear,

horsepower and labor.

•Perfect for warm-up and

cool-down on automated

systems.

AT-67207 — A MURPHY SWICHGAGE®* constantly monitors

pressure, level, temperature or load. Adjustable high and low

contacts on SWICHGAGE®are set slightly above and below

desired operating point. When demand changes, pointer touches

appropriate high or low contact and signals speed change.

AT-67207 controller responds only so long as contact is made —

Controller stops immediately when contacts separate. Slow,

smooth action prevents “hunting” or “surging” on normal applica-

tions. Stepper kit, listed below, is available for critical applica-

tions.

*Mercury tube or snap-action switches are not suitable for this type

control — AMurphy SWICHGAGE®or equal must be used.

Model STR-71204 is offered for applications where slight changes

in engine RPM make significant change is pressure, level, load, ect.

These conditions can be due to close differential requirements, con-

stant speed, automated pumps and/or valves on same line and

where engine and pump are simply oversized for application. The

stepper kit is a solid state device that meters SWICHGAGE®signal

to controller in pulses. Both “on” and “off” time periods are inde-pen-

dently adjustable to meet the most critical requirement.

Model STR-71204-N, 12/24 VDC. Negative Ground.

For more information, recommendations and quotations contact

our engineering dept.

The AT-67207 can enhance features of our SELECTRONIC®

Micro-Controller units by allowing features such as:

1. Warm-up RPM Set point.

2. Minimum RPM Set point.

3. Maximum RPM Set point.

4. Preset Operating RPM Set point.

5. Auto Throttling To Match Flows (AS Needed in Flood Control

Applications).

6. Maintaining System Pressure (As Needed in Booster Station

Application).

7. Adjustable Rate Of Change In RPM (Allowing Fine Tuning Of

Overall System).

For more information, recommendations and quotations contact

our engineering dept.

AT-67207

STR-71204

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