KMC

KMC pneumatic damper actuators are available with fixed or pedestal mounting. Fixed mounting secures the actuator directly to a bracket or surface, while pedestal mounting uses a base that allows the actuator to be mounted on a flat surface or frame. Both types are linear actuators with a clevis connection for linking to damper blades or valve stems. Stroke lengths include 3 in and 4 in, and spring ranges vary by model, such as 8 psi to 13 psi or 0 psi to 20 psi. Positioners may be included for modulating control. Selection depends on the damper or valve travel and the required fail-safe position.

KMC loop clamps are offered with vinyl plastisol or EPDM rubber cushions. Vinyl plastisol cushions are standard on galvanized steel clamps and provide abrasion protection and vibration damping for general-purpose tubing and piping. EPDM rubber cushions are used on 304 stainless steel clamps, offering resistance to weathering, ozone, and water, and are suitable for outdoor or high-moisture environments. The cushion material should be selected based on temperature range, chemical exposure, and the need for electrical isolation. Clamp sizes accommodate outer diameters from 5/16 in to 2 3/4 in.

To select a KMC pneumatic actuator, determine the damper torque requirement, the available control air pressure, and the desired fail-safe position. The actuator spring range must match the control pressure range; for example, an 8 psi to 13 psi spring range is used with a 3 psi to 15 psi control signal. Stroke length must be sufficient to drive the damper from open to closed. Mounting type depends on the damper frame and linkage. Clevis connections are standard for linear actuators. Positioners are required for modulating control, while two-position control may not need one. Verify that the actuator's force output exceeds the damper's required torque throughout its travel.

KMC loop clamps and strap clamps both secure tubing, piping, and cables, but they differ in construction and application. Loop clamps consist of a metal loop with a cushion that wraps around the tube or pipe, providing support and vibration isolation. They are typically used for instrumentation lines, hydraulic tubing, and electrical conduits. Strap clamps use a strap that encircles the tube or pipe and are often used for lighter-duty or temporary securing. KMC offers loop clamps in various materials and cushion options, while strap clamps may be available in different configurations. Selection depends on load, environment, and installation requirements.

KMC pneumatic actuators are designed for indoor HVAC and industrial environments. They are not rated for outdoor use unless protected by an enclosure or shelter. The actuators contain internal components that may be affected by moisture, dust, and temperature extremes. For outdoor applications, consider actuators with appropriate enclosure ratings or provide a protective housing. The loop clamps, however, are available with 304 stainless steel and EPDM cushions, which offer corrosion resistance and are suitable for outdoor or washdown environments. Always verify the specific model's environmental ratings before installation.

KMC pneumatic damper actuators operate on control air pressure, typically within a range of 0 psi to 20 psi or 8 psi to 13 psi, depending on the model. The spring range indicates the pressure at which the actuator begins to move and reaches full stroke. For example, an actuator with an 8 psi to 13 psi spring range will start to stroke at 8 psi and complete its stroke at 13 psi. Supply air pressure should be regulated to the actuator's maximum rating, usually 25 psi or 30 psi. Clean, dry air is required to prevent internal contamination and ensure reliable operation. Always refer to the specific model's datasheet for exact pressure limits.