Schnetz electro-hydraulic systems, dampers, and door closers

Schnetz electro-hydraulic portfolio: Uno and Duo dampers, concealed ATS door closers, fire barrier drives, radial dampers, and industrial shock absorbers.

Single-acting hydraulic dampers Uno-Dämpfer

Schnetz Uno-Dämpfer single-acting hydraulic dampers absorb kinetic forces of sliding doors, heavy hatches, and automated machinery. An adjustable throttle orifice enables engineers to calibrate deceleration forces to payload mass, preventing harsh mechanical impacts.

Continuous deceleration force regulation via precision external throttle screw
Smooth progressive deceleration without rebound or equipment impact stresses
High-strength stainless steel housings designed for demanding operating environments
Modular end buffer options including magnetic catches and polymer bumpers

Double-acting hydraulic dampers Duo-Dämpfer

Schnetz Duo-Dämpfer double-acting dampers provide controlled deceleration across forward and return strokes. Independent metering circuits allow technicians to adjust braking resistance for both movement directions, protecting bidirectional industrial systems.

Controlled bidirectional kinetic energy absorption for forward and reverse motion
Independent throttling valves for custom deceleration curves in each direction
Durable dynamic rod seals and thermally stable fluid ensuring long service life
Versatile mounting geometry suitable for horizontal and vertical arrangements

Concealed tubular door closers ATS series

Schnetz ATS series tubular door closers mount inside door leaves and frames, preserving architectural aesthetics with only the pivot hinge visible. The hydraulic assembly delivers controlled closing action and dependable latching for fire doors and elevator portals.

Concealed installation maintaining clean door profiles and entrance architecture
Hydraulic adjustment of primary closing speed and final latching acceleration
Engineered for fire barrier swing doors, elevator portals, and heavy gates
Wide opening angle capability accommodating clearances from 90 to 165 degrees

Fire sliding door drives ATS and ATS-MOF series

Schnetz ATS spring drives and ATS-MOF motorized systems automate fire protection sliding barriers and industrial gates. An integrated hydraulic governor maintains consistent closing velocity during power outages or alarm triggers, preventing uncontrolled door impact.

Controlled barrier closure upon emergency signal or facility power disruption
Mechanical spring mechanisms paired with electromagnetic hold-open modules
Electric motor drives enabling automated everyday passage opening cycles
Direct compatibility with control boards and approved hold-open devices

Radial speed regulators and rotary motion dampers

Schnetz radial dampers and rotary speed regulators govern gravity-driven closures, inclined barriers, and sliding door assemblies. The internal hydraulic gear mechanism generates constant braking torque, ensuring velocity remains within regulated safety thresholds.

Constant descent speed regulation preventing thermal fluid degradation
Precision gear pinion engagement with guide racks for steady linear travel
Thermal compensation circuitry maintaining resistance across ambient shifts
Elimination of kinetic runaway risks on inclined industrial trackways

Industrial hydraulic shock absorbers and oil brakes

Schnetz industrial shock absorbers decelerate moving carriages on machine tools, robotic handling stations, and conveyor lines. Engineered multi-orifice hydraulics absorb kinetic energy under steady deceleration, protecting guideways from premature wear.

Smooth linear deceleration without mechanical peak shock loads on equipment
Substantial reduction in factory floor impact noise and operating vibrations
Extended operational life for linear guideways, tool slides, and sensors
Robust rod sealing technology resistant to cutting fluid, chips, and dust

Schnetz electro-hydraulic history and engineering manufacturing standards

German family enterprise Albert Schnetz was established in 1946 in Munich and has specialized for more than seven decades in developing electro-hydraulic assemblies for fire barriers and industrial machinery.

The firm integrates Bavarian engineering principles with precision computerized machining centers. All primary fabrication and testing take place in Munich facilities.

Manufacturing protocols enforce metallurgical analysis of alloy steels, cylindrical bore inspection, and high-pressure hydraulic proof testing on every assembled unit.

The systems align with DIN EN guidelines and DIBt building directives, providing reliable barrier deployment during facility emergencies.

Mounting and calibration of Uno and Duo hydraulic dampers

Installing Schnetz Uno and Duo dampers demands exact coaxial alignment between the piston rod center and moving gate trajectories. Angular misalignment exceeding two degrees promotes uneven guide bushing wear and seal leakage.

Dampers must mount to rigid structural supports capable of withstanding dynamic deceleration loads without frame flexing.

Braking force calibration is performed using the external throttle needle on unloaded equipment, gradually increasing resistance until smooth stopping occurs. Precise throttling eliminates bounce and equipment shock at the end of travel.

Corrosion-resistant stainless steel housings and polymer buffers are specified for humid environments.

Concealed mounting technology for ATS tubular door closers

Schnetz ATS tubular door closers embed directly into door stiles and frames, ensuring concealed installation that preserves entrance architecture on fire barriers.

Mortise cavity milling must match cylinder envelope dimensions closely to prevent structural distortion and mechanical binding of internal pivot hinge assemblies.

Following installation, the hydraulic circuit allows dual-stage regulation: primary swing speed and final latching acceleration are independently tuned via sealed adjustment screws.

Oil-resistant polymer O-rings seal all needle ports, preventing hydraulic fluid leakage through millions of swing cycles in elevator lobbies.

Commissioning of ATS and ATS-MOF fire gate drive assemblies

Commissioning Schnetz ATS spring drives and ATS-MOF motorized systems requires verifying guide track alignment across sliding barrier openings. Roller trolleys must move freely without binding along the entire span.

Internal drive spring pre-tension is calibrated according to total door mass and roller rolling friction coefficients.

An electromagnetic holding device retains the barrier in the open position until an emergency signal arrives from fire detection panels. The integrated hydraulic governor limits closing speed, preventing dangerous acceleration under counterweight or spring forces.

Control modules ensure smooth acceleration and limit switch management.

Maintenance protocols for radial speed regulators and rotary dampers

Schnetz radial dampers regulate gravity descent on inclined sliding barriers and counterweighted industrial systems. Routine maintenance inspections verify proper gear pinion engagement with the linear rack mounted along the moving barrier.

Backlash must remain within manufacturer tolerances without angular tilt or binding.

The internal hydraulic circuit is filled with high-viscosity synthetic fluid that maintains consistent braking torque across temperature ranges from minus thirty to plus fifty degrees Celsius.

Rack teeth must be cleared of debris and coated with industrial grease to suppress abrasive wear on drive gears.

Shock absorber inspection and piston rod maintenance guidelines

Schnetz hydraulic shock absorbers and oil brakes installed on automation equipment and machining centers require periodic rod inspection. The polished rod surface must remain free of scratches, burrs, and adhered metal debris.

Polyurethane scraper seals prevent coolants and grinding particulates from penetrating internal fluid chambers.

If fluid seepage appears around the rod wiper, the cylinder should be serviced to replace the seal set and inspect internal throttling orifices.

Keeping outer cylinder housings clean promotes effective heat dissipation during high-frequency production runs, maintaining calculated deceleration curves.

SCHNETZ and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of SCHNETZ and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.