Graco Meter-Flo Pump Packages User Manual

Meter-Flo® Pump Packages

Circulating Oil Systems

Trabon® Meterﬂo® Pump Packages

Meterﬂo® Pump Packages For System Savings

12608

Meterﬂo packages are intended for relatively large systems (100 to 1,000 points), with a total requirement of up to 245 cubic inches per minute supplied by electric motor driven gear pumps. Meterﬂo pump packages are typically used with Trabon® MSP, MXP, and MGO series progressive divider valves, which accurately piston-proportion the oil input to a multiple number of lubrication points. A big advantage of the positive piston displacement is the reduction in total lube volume required as compared to unmetered systems. This results in much smaller pumps, tubing sizes, and

ﬁlter capacity. Motor horsepower is also reduced, with savings in frame size and energy costs.

Graco’s Meterﬂo pump packages come with a wide assortment of displacements, options, and accessories to handle a wide variety of applications. These pre-assembled packages are ready for connection to Trabon series progressive lube systems, operating in either a terminating or circulating mode.

FEATURES/BENEFITS

Flooded suction pumps for maximum performance• Full rated output at rated pressure• Seven different displacements from 14 to 245 in• System protected with 1,200 psi internal relief valve• External relief (adjustable) factory set @ 1,000 psi• 15 and 30 gallon reservoirs with level gauge, ﬁller/breather, •

return line/pressure ﬁll port, suction line ﬁtted with strainer and shut-off valve for ease of service

Options and accessories include low level, high level, and •

pressure switches; pump housing safety covers; ﬁlters; controllers; and 115 to 460 VAC motors

/min

UNLIMITED APPLICATIONS

Meterﬂo packages are used in a wide range of applications, from individual machines to high volume production lines. A few of the many applications include:

Stamping presses• Textile mills• Transfer lines• Plastic sheeters• Printing presses• Plastic molding machines•

Coil processing equipment• Metal turning machines• Primary metal mills• Food processing equipment•

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Trabon

Meterﬂo® Pump Packages

12608

DESCRIPTION

The Meter-Flo pump package consists of various user selected options. These are listed below to help select the unit best suited for the application in mind.

Pump

Meter-Flo packages come with rugged gear pumps made of hardened steel gears, precision ground to assure a close ﬁt, efﬁcient operation and long-lasting dependability. An internal relief valve provides redundant protection for the pump, in case the external relief is disabled for any reason. Output capabilities range from 14 to 245 cu.in./min.

Motor

The gear pump is driven by a direct coupled 1/2 horsepower motor that can be speciﬁed as either 15/230 or 230/460 VAC. These are single phase foot mount 56 frame motors turning a 1725 RPM.

Pressure Switch Option

The pressure switch provides an electrical signal in case of excessive pressure, indicating a blockage or restriction in the lube system. This signal can be used to trip a warning device or to shut the machine down. The pressure switch is adjustable, factory set at 800 psi, with recommended settings at 50 to 100 psi above normal operating pressure highs.

Pressure Filter Option

The Meter-Flo discharge ﬁlter utilizes a non-bypassing industry standard “HF2” design 10 or 20 micron element. Filter assemblies are available with either visual or combination visual/electrical element condition indicator set to a pressure differential of 50 psi, indicating the ﬁlter element requires changing.

High Level Switch Option

The high level switch is primarily used when the Meter-Flo package is utilized with automatic reﬁll system. The high level switch provides an electric signal to shut off lube supply to the reservoir.

Figure 1. Motor Starter Used with Graco

Controllers

Reservoirs

Reservoirs come in 15 and 30 gallon capacities, providing volume multiples witch are 30 to 500 times the maximum pump displacements. These large multiples allow for high volume draw-downs and return surges for circulating applications, such as stamping presses. Standard reservoir features include a top mounted ﬁller/strainer, visual level gauge, 140 micron suction strainer, and a 1/2 in NPSF port for use with a return line or for pressurized ﬁlling. Reservoirs can be ﬂoor mounted by using four holes provided in the base ﬂanges for 1/2 bolts. Top ﬁlling is made easy by a maximum reservoir height of less that 34 in. The ﬁller/breather cap is retained by a chain assembly, and has a 30 mesh ﬁll screen.

Reservoir Fill Filter Option

Controller Option

The Meter-Flo unit also has an optional control package to operate and monitor the lube system on either a continuous or intermittent cycle.

The WMP Maxi-Flo will schedule lube periods on either a time basis or machine stroke/cycle count at a user determined frequency. Once a lube period begins, the WMP controller will also monitor lube system operation through a cycle switch or proximity switch attached to the divider valve. As long as the WMP receives the proper number of actuations from the cycle/proximity switch within a monitored interval for each lube period, system operation will be considered normal. If the monitor interval expires before the proper number of actuations occur, a fault signal will be generated. The fault can be caused by blockages, defective pump, open main line, etc., but this is a warning that the lube system is not operating properly and trouble shooting methods should be taken.

The Lube Sentinel II option monitors the lube system when run on a continuous basis. Through the use of a timer circuit and a cycle/proximity switch mounted on a divider valve, the Lube Sentinel II detects reduction in ﬂow rates (clogged ﬁlter) as well as no-ﬂow (line blockage) and signals this malfunction.

This option utilizes the Trabon non-bypassing style spin-on ﬁlter assembly to prevent contamination form entering the reservoir. It comes complete with a 0 to 160 psi pressure gauge and external bypass to protect the element against line surges and high differential pressures due to contamination. It is compatible with petroleum based oil.

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System Start-up

When a lube system is ﬁrst started, it is necessary to prime and bleed the air out of the lube lines, and check for proper operation. Refer to Graco Bulletins L30103 and L30101 for information on these procedures.

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