Norgren F4.335.087 Air Cylinder

Technical Information

• Component Type: Integrated Pneumatic Cylinder and Solenoid Valve Assembly

• Bore Size (Diameter): 20 mm (D20)

• Stroke Length: 40 mm (H40)

• Manufacturer: Actuator designed by IMI Norgren (supplied as a dedicated machinery part number)

• Design Feature: It features a direct-mount solenoid valve body built directly onto the pneumatic cylinder cylinder cap. This configuration minimizes dead volume and eliminates the delay found in separate valve-and-tubing setups, enabling near-instantaneous piston actuation.

Primary Application and Usage

This specific part is used exclusively as a critical spare part in commercial offset printing presses manufactured by Heidelberg.

It is compatible with a wide range of Heidelberg high-speed press models, including:

• Heidelberg Speedmaster: SM52, SM74, SM102, CD74, CD102, CX102, XL75, XL105, and XL106

• Heidelberg Printmaster: PM52, PM74

Exact Machinery Function

Inside a Heidelberg printing press, the F4.335.087 unit is predominantly known as a Feeder Valve Assembly or Roller Control Cylinder Unit. Its exact placements and responsibilities include:

• Feeder Head Board Control: It is commonly installed in the press sheet feeder section. It controls the pneumatic mechanical toggles or separation valves that regulate the suction and mechanical timing required to lift individual paper sheets from the feed pile and pass them into the suction tape table without overlapping.

• Ink & Dampening Roller Engagement: Because of its 40 mm stroke length, it is also utilized to pneumatically throw individual ink-form rollers or dampening ductor rollers "on" and "off" mechanical contact with the plate cylinder during distinct printing cycle changes or wash-up phases.

• Sheet Brake/Slow-Down Systems: It acts as the pneumatic driver for mechanical sheet-retarding or paper-brake mechanisms at the feed or delivery end, managing sheet travel control during high-speed production runs (up to 15,000 to 18,000 sheets per hour).