Unintentional Use Prevention
Ensuring safe and reliable operation starts with preventing unintentional use of pneumatic components. Our automation components are designed with precision safety features that minimize the risk of accidental activation, protecting both personnel and equipment. From intuitive locking mechanisms to fail-safe designs, our solutions help you maintain control, reduce downtime, and keep your processes running smoothly—so your team can focus on what matters most: productivity and safety.
Additional Info
Lock Out Valves and Two Hand Control Valve
Pressure Relief 3-port Valve
The VHS series pressure relief valve provides a convenient means of isolating supplied pressure in a pneumatic system and exhausting downstream pressure for maintenance purposes. The units can be locked in the exhaust position and can be an integral part of an energy isolation system. Air flow direction is easily identified by handle orientation and labelling.
Two Hand Control Valve
Series VR51 is a safety valve for applications where machine operation with two hands is recommended. It conforms to EN574. The operating pressure range is .25 - 1 MPa.
Locking Cylinders
C(D)BJ2, Air Cylinder w/ End Lock
Series CJ2-Z stainless steel tube, air cylinders are available in 10 and 16mm bore sizes with stroke lengths from 15mm to 200mm. Available in 7 mounting types for versatility. Auto switches are available in band and rail mounting types. The CJ2-Z switch bracket is transparent to improve visibility of the indicator LED. Pivot and rod end brackets can be ordered with the cylinder under one part number.
CLM2 Fine Lock Cylinder
The series CLM2 offers a brake mechanism to stop the piston rod at any position while retracting or extending. With three different brake mechanisms and four bore sizes available, SMC gives you the choice of the best unit for your application. The compact and lightweight CLM2 is a part of the CM2 product line.
CLQ Lock Cylinder
Compact cylinder series CLQ offers drop prevention when the pressure of air source is decreased or the residual pressure is released. The CLQ has a low profile design, with a compact lock unit. Available in 8 bore sizes ranging from 20 to 100mm, and is auto switch capable.
CNA2 Lock Cylinder
The CNA2 series cylinder with lock is suitable for mid-stroke stops, emergency stops, and drop prevention. An equal holding force in extending and retracting directions make it possible to lock at either end of the stroke. High reliability and stable holding force are maintained by using a substantially lengthened brake shoe with superior wear resistance. The locking mechanism is isolated from lock release air, so lock function is not diminished by excessive dirt or drain in compressed air.
CNG Lock Cylinder
Greater locking efficiency as well as stable locking and unlocking operation has been achieved with the CNG cylinder series by arranging a large number of steel ball bearings in circular rows. The floating taper ring provides alignment and stable locking force with respect to piston rod eccentricity. Unlocking pressure of 0.25MPa (0.05MPa lower than conventional SMC product).
CNS Lock Cylinder
The CNS series cylinder with lock is ideal for applications requiring intermediate and emergency stop and drop prevention. The compact lock unit saves space and the enclosed construction and separation of the lock mechanism and the unlocking piston chamber minimizes the influences of poor air quality.
MLGC Fine Lock Cylinder
The MLGC integrates a round body, fine locking cylinder for its power source with external guide rods to combine for a compact, light weight unit. Its fine lock mechanism can lock at mid-stroke, either in the extend or retract stroke cycle. The fine lock mechanism can be activated either by a spring force, as a drop prevention measure when air pressure is lost, or actived pneumatically with pressurized air to lock the rod position into place for holidng a work piece. Both spring and pneumatic locking mechanism can be used in one unit. It is designed with air cushions at the end of stroke for maximum kinetic energy absorption. The (L) high precision ball bushing allows for smooth operation that ensures stable travel resistance, suitable for pushing and lifting applications. The (M) carbon steel alloy slide bearing provides lateral stability protecting it from side load impacts, suitable for stopping applications.
MLGP Lock Cylinder
The MLGP-B/F is a compact body, locking actuator integrated with internal guide shafts to isolate the load bearing from the movement of the actuator's rod and seals. The locking mechanism can be specified for either the extension side (F) or the retraction side (B) of the stroke. The brake spring, locking mechanism will engage when air pressure is lost for drop prevention applications and can be released by reintroducing air pressure or via a manual process. The (L) high precision ball bushing allows for smooth operation that ensures stable travel resistance, suitable for pushing and lifting applications. The (M) carbon steel alloy slide bearing provides lateral stability protecting it from side load impacts, suitable for stopping applications.
MLU Lock Cylinder
Plate cylinder with lock series MLU is ideal for maintaining supply pressure to prevent dropping of the load when residual pressure is released. Drop prevention is possible at any point of stroke. Lock positions can be changed to accommodate the position of the external stopper and the thickness of the clamped work piece.