Pneumatic And Hydraulic Equipment Page 674

SPECIALTY VALVES Binary Valves Air Timers Delay Signal Timing In (Normally Closed) Circuit In this circuit, the 3-way valve is actuated and air is sent to the control valve. The control valve shifts, sending air through port A to the cylinder, which extends. Air also flows to the timer where it begins to time to the pre-setting. Once reached, the timer opens, allowing the air to flow through to the control valves other pilot port, shifting the valve back. Air flows through port B, retracting the cylinder. Timing Out (Normally Open) Circuit When the 3-way valve is actuated, air flows through the NO timer to the control valve. The 3-way valve remains actuated. The control valve shifts, sending air through port A to the cylinder, which extends. At the same time, the timer begins to time to the pre-setting. Once reached, the timer closes, blocking off the air flow to the control valve, which spring returns. Air flows through port B, retracting the cylinder. Air timers are used to delay the air signal coming in or out of an air component. Depending on the model, the delay may be adjusted from 0.75 to 30 seconds. Input port is indicated by a yellow dot. Timers are available in either normally closed (NC) or normally open (NO) models. Normally closed models are used to time in and normally open models are used to time out. Once set, timers are accurate for repeatability to 10% with regulated air pressure. General Specifications Filtration 40 micron filtration recommended Lubrication 30wt. non-detergent oil Pressure Range 50-150 PSI (NC); 40-150 PSI (N0) Mounting (2) 11 /64 clearance holes Ports 1 /8" Temp Range 50F to 120F Port Sizes/Material 1 /8" / Acrylic Model Number NC NO Price Range Ports Length Width Height KLC-105 KLH-105 $91.16 0.75-6 sec. 1 /8" 4" 1" 1 1 /2" KLC-110 KLH-110 $91.16 1-11 sec. 1 /8" 4" 1" 1 1 /2" KLC-212 KLH-212 $163.49 15 sec.-2 min. 1 /8" 4 7 /8" 1 7 /8" 1 1 /2" KLC-230 KLH-230 $128.37 2-30 sec. 1 /8" 4 7 /8" 1 1 /2" 1 7 /8" KLH-260 KLH-260 $151.49 10-60 sec. 1 /8" 4 7 /8" 1 7 /8" 1 1 /2" Note: NC timers have a green spool; NO timers have a red spool. For special timers, consult factory. KLC-110 The USV-100 provides alternating outputs from a single input port. The valve has two outputs which are selected alternately by applying a pulsing, on-off air signal to the input port. USV-100 will not function properly with a sustained signal. When pressure is applied to port 1, it flows through the valve to provide an output at port 2. When the pressure is released from port 1, the valve changes over so that when pressure is next applied at port 1, air flows out through port 3. Release of the pressure again changes the valve back to its original position. Therefore, each time pressure is applied and released to port 1, outputs 2 and 3 change over. Note: The air signal must be fully exhausted to enable the valve to change over properly. Power models ( USV-250 ) provide the same binary function as the 100 model but, in addition, offer full 4-way control power. They are suitable for direct connection to double- acting air cylinders. The USV-250 features a positive feed back from the outputs, eliminating incorrect sequential operation caused by poor signal performance. 5 /32 " ! Push-In Fittings Technical 100 250 Specification Model Operating Pressure 35-100 PSI Flow to atmosphere 4SCFM @100 PSI 36.9 SCFM @100 PSI Permissible Mediums Air and Inert Gas Air and Inert Gas Ambient Temp. Range 10F to 120F 10F to 120F Lubrication Recommended Not necessary Flow C v = 0.75 USV-100 $ 99.31 USV-250 $ 200.51 Mead (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j hf.com JHF Catalog [ Volume 7 ] 674 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

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