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- Page 1 172-65254M-03 (A-COS-10) 27 October 2008 ISO 9001/ ISO 14001 Manufacturer Kakogawa, Japan is approved by LRQA LTD. to ISO 9001/14001 Pressure Reducing Valve for Air COSPECT A-COS-10 Copyright © 2008 by TLV CO., LTD. All rights reserved...
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Page 2: Table Of Contents
COSPECT pressure reducing valve for air, model A-COS, is a new reducing valve that eliminates these problems and makes possible the supply of very dry air at a constant pressure. -
Page 3: Safety Considerations
The three types of cautionary items above are very important for safety: be sure to observe all of them as they relate to installation, use, maintenance and repair. Furthermore, TLV accepts no responsibility for any accidents or damage occurring as a result of failure to observe these precautions. - Page 4 When disassembling or removing the product, wait until the CAUTION internal pressure equals atmospheric pressure and the surface of the product has cooled to room temperature. Disassembling or removing the product when it is hot or under pressure may lead to discharge of fluids, causing burns, other injuries or damage.
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Page 5: Specifications
Specifications Install properly and DO NOT use this product outside the recommended operating pressure, temperature and other specification ranges. CAUTION Improper use may result in such hazards as damage to the product or malfunctions which may lead to serious accidents. Local regulations may restrict the use of this product to below the conditions quoted. -
Page 6: Correct Usage Of The Cospect Pressure Reducing Valve
If an on-off valve, such as a motorized valve, is required, install it at the inlet side of the COSPECT. If a solenoid valve is installed at the outlet of the reducing valve, its opening and closing will cause heavy chattering and may lead to damage of the piston and main valve. - Page 7 ① Inlet (primary side) of the pressure reducing valve NOTE: d = pipe diameter Maintain a straight piping Valve, strainer, Valve, strainer, COSPECT COSPECT elbow, etc. elbow, etc. run of 10 d or more when a manual valve, a strainer or an elbow, etc.
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Page 8: Configuration
Configuration Name Main Body Trap Body Trap Cover Separator Float Float Cover Trap Valve Seat Separator Screen Main Valve Seat Main Valve Piston Cylinder Pilot Screen Pilot Screen Holder Pilot Valve Body Pilot Valve Pilot Valve Seat Diaphragm Diaphragm Support Spring Housing Coil Spring Adjustment Screw... -
Page 9: Installation
Before installation, be sure to remove all protective seals and caps. (Found in 3 locations, on the product inlet and outlets.) Installation Angle Install the COSPECT vertically, so that the arrow mark on the body points horizontally in the direction of air flow. - Page 10 5. Piping Support Install the COSPECT, paying attention to avoid excessive load, bending and vibration. Support the inlet and outlet pipes securely. 6. Maintenance Space Leave sufficient space for maintenance, approx. inspection and repair. (Unit: mm) 7. Trap Outlet Pipe For ease of maintenance, installation of a union connection is recommended for the trap outlet pipe.
- Page 11 The bypass pipe should be at least ½ of the size of the inlet (primary side) pipe. COSPECT has a built-in strainer, however in case an external strainer is installed, it should be installed ahead of COSPECT and the strainer should be installed horizontally with the basket at the 3 or 9 o’clock position in order to prevent...
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Page 12: Adjustment
Loosen the locknut Loosen the adjustment screw 4. Slowly, fully open the shut-off valve at the inlet of the COSPECT. Allow sufficient time for condensate remaining at the inlet of the COSPECT to be discharged. 5. Slightly open the shut-off valve at the outlet of the COSPECT. -
Page 13: Maintenance
Operational Check To ensure long service life of the COSPECT, the following inspection and maintenance should be performed regularly. Part... -
Page 14: Disassembly
It is a recommended practice to dismantle and inspect the COSPECT once a year for preventive maintenance purposes. It is especially important to perform an inspection immediately after the initial run of a new line or before or after equipment that is out of service for a long period of time. - Page 15 Disassembling the Pilot Section The diaphragm is removed by utilizing the notch in the pilot body. Loosen the pilot valve seat with a box wrench and remove it. Lift the pilot valve spring up and out with a pair of tweezers. Then loosen and remove the screen holder to remove the screen. Check for any fault on the seat of the pilot valve, flaws on the gaskets, and clogging of the screen.
- Page 16 Disassembling the Separator and Main Valve Turn the COSPECT upside down for easy dismantling of the separator and main valve. Loosen the hex bolts and remove the trap body. Be careful, as the separator may drop off when the COSPECT is returned to the normal attitude.
- Page 17 Cleaning After inspection and removal of any abnormality, clean and reassemble the parts. The following parts will require cleaning before reassembly: Trap Cover Piston Ring Float Cylinder Trap Valve Seat Separator Screen Pilot Screen Pilot Valve Main Valve Seat Pilot Valve Seat Main Valve and Valve Holder Adjustment Screw Piston...
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Page 18: Reassembly
25 – 40 (Float Cover) 15, 20 Trap Valve Seat 25 – 40 1 N⋅m ≈ 10 kg⋅cm Caution: If a torque greater than that recommended is applied, the COSPECT or components may be damaged. 172-65254M-03 (A-COS-10) 27 Oct 2008... -
Page 19: Troubleshooting
This product is shipped after stringent checks and inspection and should perform its intended function for a long period of time without failure. However, should there be any problem encountered in the operation of the COSPECT, consult the troubleshooting guide below. - Page 20 Replace with a new abnormally distorted or damaged diaphragm (continued) There is fluctuation in Check the flow rate, air consumption replace the COSPECT if necessary The selected model is Check the model inappropriate for the selection, replace the service conditions COSPECT if necessary...
- Page 21 Troubleshooting Chart (continued) Problem Symptom Cause Remedy Faulty air trap Air is blowing There is a build-up of Clean dirt on the trap valve seat or at the float base The body is installed Check the piping tilted The float is deformed Check for water hammer Replace with a new float There is vibration in the...
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Page 22: Product Warranty
One year following product delivery. 2. Warranty Coverage TLV CO., LTD. warrants this product to the original purchaser to be free from defective materials and workmanship. Under this warranty, the product will be repaired or replaced at our option, without charge for parts or labor.
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