Parker 4.00NLP91.00 Rodless Air Cylinder 4 in Bore 250 Psi

Product Description

The PARKER 4.00NLP91.00 is a double acting rodless air cylinder designed for industrial pneumatic motion control applications. It features a 4 inch bore and a 1 inch stroke, with a maximum working pressure of 250 psi. The cylinder body is constructed from aluminum with steel components, keeping weight low while maintaining structural integrity. Port size is 3/8 NPT, and the rod thread is sized at 3/4-16 female. Nitrile butadiene rubber (NBR) seals provide reliable performance across typical pneumatic service conditions. This cylinder is installed by maintenance mechanics, automation technicians, and industrial service professionals.

This rodless air cylinder is suited for compact linear actuation tasks in industrial and commercial automation systems where a traditional rod-style cylinder would require excessive clearance. The double acting configuration allows powered extension and retraction, making it appropriate for clamping, positioning, and transfer applications. Head or cap mounting provides flexible installation options to suit a variety of machine frame layouts. Overall assembled length is 2.75 inches and overall assembled width is 5.5 inches, making this a compact unit for tight installations.

Key Features

• Double acting operation for powered extension and retraction
• 4 inch bore with 1 inch stroke for compact linear force output
• 250 psi maximum working pressure rating
• 3/8 NPT port compatible with standard pneumatic fittings
• Aluminum body construction for reduced weight
• NBR seals for standard pneumatic service compatibility
• Head or cap mounting style for flexible machine integration

Compatibility

Designed as an OEM-style replacement or direct-fit component for industrial pneumatic systems requiring a double acting rodless air cylinder with a 4 inch bore, 1 inch stroke, and 3/8 NPT porting.

Installation Notes

Installation should be performed by a qualified maintenance technician or automation professional. Depressurize and lock out the pneumatic supply line before removing or installing any cylinder. Verify that supply pressure does not exceed the 250 psi maximum rating and that port fittings are compatible with 3/8 NPT threading before final assembly. Consult applicable OSHA lockout/tagout procedures and machine builder specifications before placing the cylinder into service.