Peninsular Cylinder Co. - cylinder repair, hydraulic cylinder repair, air cylinder repair, mill cylinder repair, tie rod repair, welded cylinder repair, big bore cylinder repair, pneumatic cylinder repair

The purpose of the “Air Bleed” feature is to eliminate trapped air from within the hydraulic cylinder upon start up. Air bubbles in a hydraulic cylinder system are dangerous, and if not removed, can put all of the hydraulic components of the system at risk for potential failure.

The air bleed feature is an optional feature that can be selected on all Peninsular Model LH low pressure hydraulic cylinders. By selecting this feature (with a /C in the ordering code) you may configure a standard “air bleed" design that will show a hole drilled through the barrel of the cylinder with an air bleed screw located in the boss which is welded above the bleed hole in the cylinder barrel. This tapped hole and screw is located near the cylinder head and can be ordered in any location coinciding with cylinder head positions #1, #2, #3 and #4 (see illustration #1 below).

There are other ways (not detailed in this configurator) to manufacture an air bleed on a hydraulic cylinder – Peninsular will do this at the customers request:

Air bleed tapped hole and screw in the front and rear cylinder head or at one end only
(see illustration #2 below).
Air bleed tapped hole with a captive screw in the front and rear cylinder head or at one
end only.
Our standard air bleed screw is 1/8" NPT. Other optional threads are - 2 SAE and - 1/8" BSPP.

Should you want the non standard air bleed design please contact Peninsular and our engineering staff will be pleased to configure this design for you.

Illustration #1: Air Bleeds located on the Cylinder Barrel

WELDED BOSS WITH A TAPPED HOLE AND AIR BLEED SCREW

Illustration #2: Air Bleed located on the Cylinder Head

ANOTHER WAY TO MANUFACTURE AN AIR BLEED ON A HYDRAULIC CYLINDER IS TO PLACE THE TAPPED HOLE AND SCREW ON THE FRONT AND REAR CYLINDER HEADS OR ON ONE HEAD ONLY. CURRENTLY THIS NON-STANDARD OPTION IS NOT DETAILED IN THIS CONFIGURATOR. PLEASE CALL US TOLL FREE AT (800) 526-7968 IN THE USA OR CANADA OR (586)775-7211 AND OUR ENGINEERING STAFF WILL BE HAPPY TO CONFIGURE ONE OF THESE OPTIONS FOR YOU.

When the Air Bleed feature is selected a /C will appear near the end of the cylinder ordering number after the cylinder is generated for configuration.