Permco Hydraulics Component System

General Information

Permco is a leading manufacturer of high-pressure hydraulic gear/vane pumps and motors, flow dividers, intensifiers, and accessories. Available in a wide variety of sizes and configurations to suit your application needs.

The Perfection Machining Company was founded in 1964 to design and manufacture replacement parts for the mining industry.   Renamed Permco 4 years later, the family-owned business developed a wide array of replacement hydraulic parts and eventually expanded its manufacturing capabilities to include cast iron parts and the resulting complete units.

Today, we maintain our focus on customer service and continue a decades-long tradition of developing fluid power systems that meet each of our customer’s specific needs. Permco’s product offering now includes gear and vane pumps/motors, flow dividers, intensifiers and a variety of accessories and components.

Permco offers the highest quality product possible to our wide customer base of OEMs and distributors.  Because we understand that our success depends on the success of our customers, we are committed to reducing customers’ costs and increasing the simplicity of doing business with us.

Permco Hydraulic Products

Bushing Pump / Motors

• 124 Series Small displacement sleeve bushing pumps and motors
• 197 Series Small to medium displacement sleeve bushing pumps and motors
• 257 Series Medium displacement sleeve bushing pumps and motors
• 360 Series Large displacement sleeve bushing pumps and motors
• 424 Series Small displacement sleeve bushing pumps and motors
• 460 Series Large displacement sleeve bushing pumps and motors

Bearing Pump / Motors

• LEGACY SERIES 1500
  • Small displacement roller bearing pumps and motors
• LEGACY SERIES 2500 Hydraulic Gear Pump
  • Medium displacement roller bearing pumps and motors
• LEGACY SERIES 3700 Hydraulic Gear Pump
  • Large displacement roller bearing pumps and motors
• SERIES 2100 Hydraulic Gear Pump
  • Small displacement roller bearing pumps and motors
• SERIES 3000/3100 Hydraulic Gear Pump
  • Small displacement roller bearing pumps and motors
• SERIES 5000/5100 Hydraulic Gear Pump
  • Medium displacement roller bearing pumps and motors
• SERIES 5151 Hydraulic Gear Pump
  • Medium displacement roller bearing pumps and motors
• SERIES 7500/7600 Hydraulic Gear Pump
  • Large displacement roller bearing pumps and motors

Vane Pump / Motors

• PT7B SERIES Hydraulic Vane Pump
  • Small displacement vane pump
• PT7D SERIES Hydraulic Vane Pump
  • Medium displacement vane pump
• PT6E SERIES Hydraulic Vane Pump
  • Large displacement vane pump
• PM4D SERIES Hydraulic Vane Pump
  • Medium displacement vane motor
• PM4E SERIES Hydraulic Vane Pump
  • Large displacement vane motor

Dump and Refuse Pump

• GEMINI DG-20 / RG-20
  • Designed to be used with dual-use applications, typically a dump trailer and live floor or goose neck
• DMD-25 / DM-640-25 SERIES
  • Pump/valve assembly for heavy and medium duty dump trucks and dump trailers
• DMD-20 / DM-512-20 SERIES
  • Pump/valve assembly for heavy and medium duty dump trucks and dump trailers
• DMR-400 / DMD-400 SERIES
  • Pump/valve assembly for medium and light duty dump trucks
• DMR-300 / DMD-300 SERIES
  • Pump/valve assembly for medium and light duty dump trucks

Flow Divider and Intensifiers

Flow dividers are used to maintain consistent flow rates in different legs of a hydraulic system regardless of the pressure in each circuit. They can also be used for intensification, to operate a component at a higher pressure than the current system supplies.

The two devices discussed in this brochure are typically constructed of the same components. It is only through their placement in a hydraulic system that one may discern whether the device is a flow divider or an intensifier.

A flow divider accepts flow and then internally divides or combines it. This division may be equal (such as 50 GPM being divided into 25 GPM and 25 GPM) or unequal (such as 50 GPM being divided into 12.5 GPM and 37.5 GPM). In turn, this device may have more than two (2) outlet ports whereby inlet flow may be divided by three (3) (such as 60 GPM being divided into three (3) equal outputs) or more. Almost any type of division of inlet flow can be achieved by selecting the correct number of gears and correct gear width.

Rotary intensifiers on the other hand divide flow to increase pressure. This enables part of the hydraulic system to work at pressure higher than the relief valve setting at the pump. Since the two devices are really one in the same, the flow dividers described above may become intensifiers. Relief valves downstream of the intensifiers are recommended.

By using these devices, you may simplify circuitry, increase the life of components and thereby reduce cost. The following describes the function and application of the FD2100/3000/3100, FD5000/5100 & FD7500/7600 flow dividers which are assembled using Permco service proven gear pump components.

FUNCTION:

Flow dividers are components in a hydraulic circuit which work only when needed and only to the extent required. Their job function is to accept flow and divide it (equally or unequally) or to combine flow in the reverse direction. They function by the principle that input fluid horsepower equals output fluid horsepower, minus the small inefficiency of the flow divider itself.

In rotary intensifiers, one of the output ports operates at a lower pressure than inlet. This
gear section of the intensifier (or flow divider) now acts as a motor providing power through the connecting shaft to the other gear sections. To reiterate, with one outlet of a two (2) section device operating at a lower pressure than inlet, the outlet can perform against a pressure higher than inlet, thus providing the intensifier function of the unit.

Both rotary flow dividers and intensifiers divide flow and distribute pressure according to the individual system requirements. The total output flow of the component is equal to its inlet flow. The output of each section is directly proportional to the gear width of the section.

Refuse Versa Pak

• VERSA-PAK FLOW CONTROL/UNLOADER SYSTEM
• VERSA-PAK DRY VALVE SYSTEM
• VERSA-PAK UNLOADING SYSTEM

Parts & Accessories

IN-LINE AND PILOT RELIEF VALVES

Features

• Same mounting footprint as competitor models
• Available in NPT or SAE/ORB porting
• Available with adjustable direct acting or internal pilot operated relief
• Comes standard with gauge port for accurate relief setting

Direct acting – Rapid response, contamination tolerant & low leakage. Nominal flow range from 0 – 46 GPM Pilot operated – Internally piloted, opens fully as setting approaches creating less system lag. More accurate through rated flow range. Nominal flow range from 0- 50 GPM.

FILTERS

A series of spin-on filters are accessorized with a selection of adapters/heads for a variety of applications. Indicators, gage ports and by-pass valves are available to customize each application. Hydraulic fluids are efficiently filtered through return line applications. Maximum working pressure 100 PSI/Burst 300 PSI.

THRUST PLATES

A high density bronze alloy is used in all Permco Thrust Plates.

GEARS AND SHAFTS

Gears/Shafts for Permco pumps and motors are cut in our own plant to extremely close tolerances.

CASTINGS

Housings, port-end covers, shaft-end covers

Monoblock & Sectional Directional Control Valves

• MB-2 ONLY ONE SECTION AVAILABLE
• MB-3 AVAILABLE SECTIONS FROM 1 TO 7
• MB-4 AVAILABLE SECTIONS FROM 1 TO 6
• MB-5 AVAILABLE SECTIONS FROM 1 TO 6
• MSB-5 AVAILABLE SECTIONS FROM 1 TO 6
• MB-6 AVAILABLE SECTIONS FROM 1 TO 4
• \SN-3 AVAILABLE SECTIONS FROM 1 TO 12
• SN-4 AVAILABLE SECTIONS FROM 1 TO 12
• SN-6 AVAILABLE SECTIONS FROM 1 TO 12
• SN-8 AVAILABLE SECTIONS FROM 1 TO 12

FLOW METER

Permco’s mechanical hydraulic tester provides the ideal solution for servicing and commissioning hydraulic circuits on agricultural, as well as on and off road mobile equipment. The kit comprises of a direct acting flow indicator with built in thermometer, a loading valve and a pressure gauge all built into a strong steel case with a removable lid.

The unit is self contained and requires no electrical power. The dials are clear and easy to read. Installation is extremely simple and the test kit can be connected to pressure, working or return lines. The loading valve and pressure gauge allow a progressive build up of system pressure in complete safety. The test kit provides the service engineer with quick, accurate and simple performance testing of pumps, motors, valves, steering systems, cylinders and complete hydraulic circuits.

There are two main elements to the flow meter – the reverse flow indicator (RFI) and the load valve. The flow indicator block houses a metering piston which moves against a calibrated spring. The piston is magnetically coupled to a rotary pointer to provide a direct reading of flow on the dial, flow scale is displayed in both lpm and US gpm. The thermometer is also mounted in the flow block near the fluid flow. Both flow and temperature scales are shielded
behind impact resistant windows.

The load valve is connected directly to the flow block and a 420 bar (6000 psi) pressure gauge is mounted in the inlet section of the loading valve. The valve is easy to operate and, combined with the pressure gauge, allows sensitive and progressive control of system pressure throughout the working range.

PRESSURE GAUGE KITS

• Permco’s Hydraulic Pressure Gauge Kit includes: 3 – Pressure Gauges, 2 – Test Hoses, 6 – Test Couplings, 1 – Durable poly case.
• \Glycerin filled, 2-1/2” x 1/4”NPT, 304 stainless steel robust case and crimped ring, shock resistant polycarbonate window, brass movement and connection, copper tube, aluminum dial plate and pointer, gray oil cap, IP67, Accuracy:+/-1.6%,
• \Hose made of resin, working pressure: 630bar/9000psi M16 x 2 female x 1/4””NPT female 6 Test points
• \One side M16 x 2 male, another size: 1/8””NPT, 1/4””NPT, 7/16-20 UNF, 9/16-20 UNF male

Features

• Glycerin filled gauges
• \6 different process connection test points
•  2 durable test hoses, 1 meter in length
• Working pressure: 630bar/9000psi
• Large clear easy to read dials
• Robust and precise pressure gauges in 3 ranges: -30inHg – 30psi, 0-3500psi, 0-6000psi Accuracy: +/- 1.6%
• Durable poly padded suitcase, portable, reliable

Ref : Product lines from PETOL™ GEARENCH

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