Technical Specifications

Why Use a Silencer-Throttle?

A conventional exhaust muffler is intended mainly to reduce noise. A silencer-throttle adds an adjustable restriction so the exhaust rate can be tuned where a directional control valve vents compressed air.

When the cylinder chamber cannot discharge as quickly, the resulting exhaust backpressure can reduce actuator travel speed. This is useful when commissioning or fine-tuning suitable pneumatic motions, but excessive restriction may cause sluggish or inconsistent operation.

How Does Exhaust Adjustment Affect Cylinder Motion?

On a double-acting cylinder, one chamber is pressurized while the other is exhausted. Depending on the valve and plumbing, restricting one exhaust outlet may affect one stroke differently from the other. A five-port valve often has separate exhaust outlets, typically ports 3 and 5.

Make adjustments incrementally with the machine in a safe condition. Cylinder load, supply pressure, cushioning and seal friction all affect the resulting motion; a silencer-throttle is not a pressure regulator.

Why a Brass Threaded Body?

Brass provides a practical machined threaded connection. Used with an aluminum valve housing, it avoids aluminum-on-aluminum thread contact, which can be prone to galling, although correct tightening and environmental compatibility still matter.

This 3/8 NPT version must match the actual exhaust-port thread. Select the port size and flow capacity for the intended actuator speed.

Typical Applications

• Cylinder exhaust-speed adjustment during machine setup
• Directional valve exhaust ports that require both silencing and throttling
• Compact pneumatic control assemblies where a separate exhaust flow-control fitting is impractical