Simplex RFS Series Flat Jack Hydraulic Cylinders are engineered to apply hydraulic force in the tightest of spaces. The powerful return spring boosts efficiency by quickly returning the plated plunger to its starting position, and the cylinder exterior is finished in an enamel coating to extend cylinder life. The design also features a wiper to protect the inner cylinder assembly from dirt, moisture, and other contaminants.
The Simplex RSF50 is a 50-ton single-acting, spring-return low-profile hydraulic cylinder designed for heavy lifting in restricted height environments. With a collapsed height of only 2.63 inches and a 0.63-inch stroke, it delivers tremendous lifting power within a compact body, making it ideal for plant maintenance, bridge repair, and structural alignment applications.
The RSF50 is built with high-strength alloy steel, a chrome-plated piston rod, and a heavy-duty return spring that ensures rapid piston retraction when pressure is released. Its single-acting design minimizes hydraulic connections, simplifying setup and maintenance. A standard 3/8″ NPTF female half coupler allows for quick attachment to any 10,000 psi-rated hydraulic pump system.
Ultra-low height: At just 2.63″ retracted, it fits under tight clearances for lifting or positioning heavy loads.
Fast spring return: Built-in spring ensures quick retraction and efficient operation between lifts.
Rugged construction: Machined from alloy steel for strength, durability, and resistance to impact or deformation.
Compact but powerful: 50-ton lifting force within a small, short-stroke package—ideal for confined workspaces.
Ease of setup: Single-acting design and standard coupler ensure fast, reliable hydraulic connections.
Limited stroke: 0.63” extension means it’s best suited for fine lift adjustments or shim applications.
Spring-return only: No hydraulic retraction; spring operation is simpler but slightly slower.
Precise load alignment required: Avoid side-loading; always keep the piston load vertically aligned.
Pump and hose requirements: Rated for 10,000 psi systems only—use appropriately rated accessories.
Tight-clearance lifting for plant or machinery maintenance
Bridge bearing or structural leveling tasks
Shipyard and offshore positioning operations
Industrial press or fixture applications requiring small, high-force movement
Ensure cylinder base is fully supported on a level, stable surface.
Use hoses, fittings, and pumps with 10,000 psi pressure ratings.
Inspect for wear, scoring, or leaks before each use.
Avoid off-center loads—use shims or spacers to maintain vertical force.
Follow Simplex operating guidelines and safety standards—improper alignment or overloading can result in equipment damage or injury.
Renting provides access to specialized lifting equipment without ownership costs.
Yes. They are frequently used in engineered lifting projects.
They are used for machinery lifting, structural lifting, bridge work, and equipment relocation.
Yes. Many low profile cylinders are available in very high capacities.
