A Selection requires evaluating the load magnitude to calculate required thrust and pull force, the desired motion speed to match flow rate, system working pressure to determine rated pressure, available installation space to choose mounting style, required stroke length, and operating environment conditions such as temperature, humidity, and corrosiveness. Additional needs such as cushioning, air bleed, or explosion-proof features must be identified. Cost and expected service life should also be balanced.

A Stroke is the maximum distance the piston rod travels from fully retracted to fully extended. It is a key parameter determined by the equipment's working requirements. When selecting, a margin of 5–10% is typically added to prevent the piston from bottoming out against the end cap and to accommodate installation tolerances.

A The stroke is based on the maximum displacement required by the actuated mechanism. A safety margin of 5–10% is added to avoid rigid impact at the stroke limits. Installation space and the motion trajectory must be checked to ensure the cylinder fits and operates without interference.

A First, determine the minimum required stroke from the equipment's motion needs. Add a 5–10% margin for installation tolerances. Keep the cylinder barrel length-to-diameter ratio under 10 to prevent buckling. Verify no interference in the installation space. For long-stroke cylinders, include cushion devices and piston rod supports to ensure rigidity and stability.

A Rated pressure is the maximum long-term safe working pressure specified by design, determined by the strength of the cylinder body, seals, and materials. During operation, pressure must be strictly controlled not to exceed this value. Exceeding rated pressure can cause seal failure, barrel damage, and other faults.

A Rated pressure is the maximum allowable pressure determined by material and seal strength and must not be exceeded in long-term operation. Working pressure is the actual system pressure during operation, which varies with load. When selecting, ensure the system's maximum working pressure does not exceed approximately 80% of the rated pressure to maintain a safety margin. Safety devices should be installed to handle pressure shocks.

A Rated flow is the maximum flow allowed during normal cylinder operation. It directly determines the piston's movement speed—higher flow produces faster motion. When selecting, the cylinder's flow requirement must match the hydraulic pump's output to avoid speed mismatches that affect operational performance.

A Bore diameter is the core parameter determining output thrust. At a fixed pressure, a larger bore provides greater effective piston area and stronger thrust. A bore that is too large increases equipment size and cost. A bore that is too small cannot meet load requirements. Bore size must be precisely matched to the load and available installation space.

A Calculate the bore diameter from the working load and system pressure. For thrust, use the full piston area formula A = πD²/4. The piston rod diameter must be verified for strength and buckling stability, controlling the slenderness ratio under compression to prevent instability. Also ensure the diameters match the flow requirements to achieve the desired speed without excessive material cost.

A Thrust can be increased by raising system pressure within the allowable range, increasing the piston diameter for a larger effective area, improving seal performance to reduce internal leakage, and optimizing oil circuit design to reduce pressure losses. Each method must stay within the cylinder's pressure and strength limits to ensure safe and reliable operation.