General Catalogue - Frank W Murphy Ltd. - #9

/ 74


catalogue search
P. 01
P. 02
P. 03
P. 04
P. 05
P. 06
P. 07
P. 08
P. 09
P. 10
P. 11
P. 12
P. 13
P. 14
P. 15
P. 16
P. 17
P. 18
P. 19
P. 20
P. 21
P. 22
P. 23
P. 24
P. 25
P. 26
P. 27
P. 28
P. 29
P. 30
P. 31
P. 32
P. 33
P. 34
P. 35
P. 36
P. 37
P. 38
P. 39
P. 40
P. 41
P. 42
P. 43
P. 44
P. 45
P. 46
P. 47
P. 48
P. 49
P. 50


See other catalogues for Frank W Murphy Ltd.

Text version of the page
P L D P revision A, 0,h May 200-1
catalogue section 05
Irrigation Pump Pressure Control
Automatic control of diesel pump demand pressure
Specifically designed for engines driving multiple irrigators
Reduces capital and running costs
Product specification
Description
The OPLC DPCO (shown above right) is a variant of the OPL series 4.5 inch/114mm pressure Swichgage®. The gauge face includes adjustable high and low pressure limit contacts: the visible contacts have a self-wiping action for positive electrical switching. The DPCO model includes a dual-pole front facia switch that allows manual selection of START (idle) or RUN (active) throttle control modes.
The OPLC DPCO uses a cast aluminium, weatherproof case, with a hinged front for inspection and wiring connection. Pressure hose connection is via a %" NPT fitting in the base.
Application
The OPLC DPCO is typically used with a Murphy AT-03069 throttle controller (shown above left) to maintain pressure in an irrigation pump system. The AT-03069 has is a heavy duty throttle controller with high torque, solid state switching and an electronic clutch, making it ideal for many automatic and semi-automatic engine systems: for full details see document AT-04052B.
The AT-03069 receives high or low pressure signals from the OPLC-DPCO (see overleaf for typical electrical connection), and throttles the engine in response. The combined system has been designed to maintain near constant pressure, even when the engine is driving multiple irrigation systems.
Murphy also recommend the connection of a Murphy PD8183 pulsation dampener in the pressure line to eliminates pointer flutter.
Case:
material
die-cast aluminium
paint finish
polyurethane, red
sealing
weatherproof, NEMA 3R
process connection
%" NPT
Movement:
dial
4.5 in. (114mm)
scales
white text on black background
0 - 20 Bar
0 - 200 PSI / 14 bar
0 - 300 PSI / 20 bar
sensing element
Bourdon C-tube,
grade A phosphor bronze
accuracy
±1 % for middle half of scale,
±2% for first and last quarters
geared movement
302 and 304 stainless steel
lens
optically clear polycarbonate
pointer
high visibility with a pointer
calibration hub
contact/circuit rating
2A @ 30 VDC
1A @ 125 VAC
General:
maximum ambient temperature
150°F / 66°C
approximate shipping weight
2.5 Kg
electromagnetic compatibility
to 89/336/EEC
CONTROL SYSTEMS AND SERVICES DIVISION
PO Box 1819, Rosenberg, Texas 77471, USA tel: +1 281 633 4500 fax: +1 281 633 4588 email: sales@fwmurphy.com
MURPHY DE MEXICO S.A. DE C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P. México 78384
tel: +52 444 8206264
fax: +52 444 8206336
Villahermosa office tel: +52 993 3162117
email: ventasmex@murphymex.com.mx web: www.murphymex.com.mx
FRANK W. MURPHY LTD.
Church Rd, Laverstock, Salisbury, SP1 1QZ, UK tel: +44 1722 410055 fax: +44 1722 410088 email: sales@fwmurphy.co.uk web: www.fwmurphy.co.uk
MURPHY SWITCH OF CALIFORNIA
41343 12th Street West, Palmdale, CA 93551-1442, USA tel: +1 661 272 4700
fax: +1 661 947 7570
email: sales@murphyswitch.com web: www.murphyswitch.com
MACQUARRIE CORPORATION
1620 Hume Highway, Campbellfield, Victoria 3061, Australia tel: +61 3 9358 5555
fax: +61 3 9358 5558
email: murphy@macquarrie.com.au
FW Murphy
PO Box 470248 Tulsa, Oklahoma 74147, USA tel: +1 918 317 4100 fax: +1 918 317 4266 email: sales@fwmurphy.com web: www.fwmurphy.com
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
3

pageCatalog pdf di En 2012-05-20-14