Pneumatic & Hydraulic Components replacement guide

Identify cylinders, hydraulic motors, pumps, valves, manifolds, accumulators, air-preparation components, and fluid-power accessories from markings and interface data.

Evidence boundary. Fluid-power replacements require the full circuit context. Bore, port, displacement, or thread alone is not enough to establish interchangeability.

Items covered01 · 17 component types

Pneumatic cylinders
Rodless cylinders
Rotary actuators
Pneumatic grippers
Air-preparation units
Air regulators
Air lubricators
Valve manifolds
Pneumatic valves
Hydraulic cylinders
Hydraulic pumps
Hydraulic motors
Hydraulic valves
Accumulators
Hydraulic power units
Proportional valves
Quick couplers

What to capture02

Manufacturer, series, and full part numberRecord this before searching for a substitute.

Bore, stroke, rod, displacement, ports, and mountingRecord this before searching for a substitute.

Pressure, flow, speed, force or torque, and dutyRecord this before searching for a substitute.

Port and thread standard plus manifold patternRecord this before searching for a substitute.

Fluid, seals, temperature, controls, and safety requirementsRecord this before searching for a substitute.

What must match03

Pressure and flow limitsConfirm it against the original equipment, duty, and source documentation.

Mounting, stroke, displacement, and envelopeConfirm it against the original equipment, duty, and source documentation.

Port, thread, manifold, and hose compatibilityConfirm it against the original equipment, duty, and source documentation.

Seal and fluid compatibilityConfirm it against the original equipment, duty, and source documentation.

Controls, response, contamination sensitivity, and safetyConfirm it against the original equipment, duty, and source documentation.

Common searches04

What cylinder replaces this one?

How do I identify a hydraulic valve?

What hydraulic motor replaces this model?

Can I replace a pneumatic component by bore and stroke?

Authoritative starting points05

Parker catalogshttps://discover.parker.com/msgcatalog Parker pneumatics divisionhttps://www.parker.com/us/en/divisions/pneumatics-division.html

Manufacturer-backed hydraulic hose/fitting lookup450 Parker Catalog 4400 records

Parker Catalog 4400 hose and fitting part lookup

Browse exact Parker August 2026 part-number rows with source-section context, published values, row hashes, and explicit hose/fitting compatibility boundaries.

Browse 450 Parker Catalog 4400 records →

Manufacturer-backed hydraulic quick-coupling lookup500 Dixon DQC2026 parts

Dixon hydraulic quick-coupling part lookup

Browse exact Dixon hydraulic coupling identities with connection, material, inch/mm length, maximum OD, hex size, and source-row provenance.

Browse 500 Dixon hydraulic quick couplings →

Manufacturer-backed push-to-connect fitting lookup500 Parker Prestolok parts

Parker Prestolok push-to-connect fitting lookup

Browse exact Parker Catalog 3501E PLP Metal and PLP Composite part numbers with manufacturer table context and source-row provenance.

Browse 500 Parker Prestolok fittings →

Manufacturer-backed pneumatic fitting lookup473 Festo current-verified parts

Festo QS / QSM push-in fitting part-number lookup

Browse exact Festo part numbers and published type designations from manufacturer ordering tables; every included item was reverified against a current 2026 EN_US Festo datasheet index.

Browse 473 Festo QS / QSM fittings →

Related lookup guides1 workflow

pneumatic cylinder replacement

Pneumatic cylinder replacement: what to measure

Capture bore, stroke, mounting, rod-end, port, cushion, sensor, and pressure details before selecting a pneumatic cylinder.

Open guide →

Source-backed field guides1 guide

Pneumatic & hydraulic components

Hydraulic cylinder replacement

How to specify a hydraulic-cylinder replacement using bore, rod, stroke, mounting, pin geometry, ports, pressure, speed, seals, cushioning, sensors, and duty.

Open guide →

Search the verified catalog Identify an unknown part