The TLV COS-16 is a pressure reducing valve for steam. Steam-using equipment can perform its intended operation only when dry saturated steam is available. Steam containing entrained condensate, scale, air, etc. not only reduces steam equipment productivity, but also shortens the life of pressure reducing valves. TLV reducing valves models COS and COSR are innovative reducing valves, which help eliminate these problems by supplying dry saturated steam at a constant pressure at all times.

1. Safety Considerations

WARNING

Install properly and DO NOT use this product outside the recommended operating pressure, temperature and other specification ranges. Improper use may result in such hazards as damage to the product or malfunctions, which may lead to serious accidents.

2. Configuration

Key components include the Main Body, Trap Body, Trap Cover, Separator, and Float. Replacement parts are available in maintenance and repair kits for the main valve, piston, piston ring, pilot valve, and trap valve seat.

3. Specifications

Acceptable Operating Range (COS-16 / COSR-16 / COSR-16HT)

• Primary Pressure Range: 0.2 to 1.6 MPaG (2 to 16 barg, 30 to 250 psig)
• Secondary Pressure Adjustable Range: Within 10 to 84% of primary pressure (Minimum adjustable pressure of 0.03 MPaG, 0.3 barg, 5 psig)
• Minimum Adjustable Flow Rate: 5% of rated flow rate (10% of rated flow rate for sizes 65 mm and larger)

4. Piping and Installation

To ensure stable steam flow, it is recommended that the COS/COSR be installed on straight runs of piping.

• Inlet (primary side): Maintain a straight piping run of 10d or more when a manual valve, a strainer or an elbow is installed. Maintain 30d or more for an automated valve (on-off valve).
• Outlet (secondary side): Maintain a straight piping run of 15d or more when a manual valve, a strainer or an elbow is installed. Maintain 30d or more for a safety valve, another pressure reducing valve, or a control valve.

Installing an ON-OFF Valve

If an on-off valve is required to stop supply of steam to the steam-using equipment, install it at the inlet side of the COS/COSR. If a solenoid valve is installed at the outlet, it will cause heavy chattering and may lead to damage of the piston and main valve.

Blowdown

Before installing the unit, be sure to blow down all piping thoroughly. Blowdown is especially important for newly installed piping or after the system has been shut down for a long period of time.

Installation Angle

Make sure the COS/COSR is installed on horizontal piping, so that the arrow mark on the body matches the direction of steam flow and the adjustment screw section faces up. Allowable inclination is 10 degrees in the fore-aft direction and 15 degrees in the plane perpendicular to the steam flow line.