Rexroth valve

REXROTH “A” PILOTAIR® VALVE SERVICE INFORMATION

PANEL MOUNTED “A” PILOTAIR® VALVE
The Panel Mounted “A” PILOTAIR Valve is a poppet type pneumatic directional control valve consisting of a cam housing assembly and a valve portion assembled in a variety of configurations.

SEE “WARNING: INSTALLATION AND MOUNTING” ON FRONT COVER.

Latest Design Features
Several features have been designedinto the Panel Mounted “A” PILOTAIR Valve for added strength, easier maintenance and longer service life.

•One-piece solid steel shaft for increased strength •Bronze bearings in cam housing for longer wear •Separate steel handle and hub for increased strength •Tooth-type Nylatron plastic detents for longer wear and more positive detenting •Internal centering spring assembly for longer wear andmore positive handle centering •One-piece supply valve sub-assembly for easier, more economical maintenance •Die-cast anodized aluminum body and cam housing for lighter weight, added strength
resistance.

and corrosion

•Improved latch •Simplified “cartridge” repair

Installation
The Panel Mounted “A” PILOTAIR Valve can be mounted in either a horizontal or vertical panel. For mounting holedimensions and operator travel, refer to sales catalog SC-700-800.

Operation
The Panel Mounted “A” PILOTAIR Valve is designed to operate at pressures up to 250 psi (17.2 bar) within a temperature range of -40º F to 200º F (-40° C to 93° C). Refer to Figure 11. With no mechanical force on the valve disc seat, the inlet valve seats and seals the passage from the inlet to the outlet port. Theoutlet port is vented to atmosphere through the center of the plunger. As the plunger is forced downward by the cam force, it seats on the valve disc. This seals the passage between the outlet port and atmosphere. Further downward travel of the plunger unseats the valve disc from the inlet valve seat and allows inlet air pressure to flow to the outlet port. Several variations of valve operation andhandle holding functions are available in the Panel Mounted “A” PILOTAIR Valve .

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2-BA-1 PILOTAIR Valve is a two position button operated valve. 2-HA-1 PILOTAIR Valve is available with either a twoposition detent or a two-position latching handle. 2-HA-2 PILOTAIR Valve is available with a two-, three-, or five-position detent, a latching handle for various positions, or a spring-centeredhandle. 2-HA-3 and 2-HA-4 PILOTAIR Valves are usually pingated in each handle position, but detents in each position are also available. A three- or five-position detent can be supplied on single handle valves if required.

Figure 11. Valve Portion Assembly View

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REXROTH “A” PILOTAIR® VALVE SERVICE INFORMATION Valve Portion Maintenance
2-BA-1 PILOTAIR VALVE DISASSEMBLY
Referto Figure 16, and completely disassemble the valve portion in sequence shown.

HOUSING DISASSEMBLY
Refer to Figure 17 (page 17). Disassemble the housing in sequence shown.

CLEANING
1. Clean all metal parts with a nonflammable solvent. 2. Wash all rubber parts with soap and water. 3. Rinse parts thoroughly and blow dry with a lowpressure air jet. 4. Inspect all parts and replace those whichare worn or damaged.

CLEANING
1. Clean all parts with a nonflammable solvent. 2. Rinse parts thoroughly and blow dry with a lowpressure air jet. 3. Lubricate Driv-lok pin, shaft of push-button and both sides of cam dog with Number 107 Lubriplate.

REASSEMBLY REASSEMBLY
Refer to Figures 11 and 16, and reassemble the valve portion. 1. The cartridge valve assembly (6) is designed to simplifyrepairs and eliminate possible problems in assembly. 2. Lubricate all metal-to-metal contact surfaces with Number 107 Lubriplate. 3. Lubricate all rubber parts with Dow Corning No. 55 Pneumatic Grease. 4. After reassembly is complete, install the operator and test for correct operation and evidence of leakage. Refer to Figure 17, and reassemble the housing.

2-HA-1 PILOTAIR VALVE HOUSING...