TLV CV-COS-16 electro-pneumatic control valve features a digital I/P positioner combined with a compact pneumatic actuator. It is equipped with a built-in cyclone separator and a self-modulating free float steam trap to provide dry, high-quality steam supply, improving productivity and product quality for process applications.

Features

• Built-in cyclone separator and self-modulating free float steam trap provide dry, high-quality steam supply.
• Removal of condensate while the valve is closed reduces scale adhesion and water hammer.
• Pneumatic actuator with digital I/P positioner in a compact configuration.
• Rolling actuator diaphragm ensures linearity over the operating stroke and maximizes life.
• Self-adjusting positioner features zero calibration by auto-tuning, ensuring tight shut-off and improving control during low flow.
• Positioner LCD allows simple operation with capacitive keys and displays valve travel and error codes.
• Self-adjusting chevron packing minimizes seal leaks, stem wear, and stiction/hysteresis problems.
• DN 40 and DN 50 models feature a silencer for noise reduction.

Safety Warning

NEVER apply direct heat to the float. The float may explode due to increased internal pressure, causing accidents leading to serious injury or damage to property and equipment.

Caution

DO NOT use the product in excess of the maximum operating pressure differential. Such use could make discharge through the steam trap impossible (blocked). Take measures to prevent people from coming into direct contact with product outlets.

Specifications

Valve Specifications

Model	CV-COS-16
Body Material	Ductile Cast Iron / Cast Stainless Steel
Connection	Flanged
Size (DN)	15, 20, 25, 40, 50
Max. Operating Temperature (TMO)	220 °C
Leak Rate Class	Class IV / Metal sealing
Characteristic	Equal percentage
Rangeability	50 : 1
Applicable Fluid	Steam

Actuator / Positioner Specifications

Fail-safe Position	Valve CLOSED (Air to Open)
Motive Medium	Oil-free air, filtered to 5 μm
Electrical Input Signal	4 to 20 mA
Air Supply Pressure	3.7 to 6 barg
Ambient Temperature Range	-25 to +80 °C
Protection Class	IP 66
Intrinsically Safe Rating (optional)	ATEX II 2G Ex ia IIC T4

Structure and Configuration

No.	Description	No.	Description
1	Main Body	16	Separator Screen
2	Separator Body	17	Separator
3	Trap Cover	18	Wave Spring
4	Flange	19	Valve Seat Gasket
5	Guide Bushing	20	Separator Body Bolt
6	Valve Bonnet Nut	21	Float Cover
7	Valve Bonnet	22	Float
8	Stuffing Box V-ring Packing	23	Float Cover Bolt
9	Stuffing Box Washer	24	Spring Washer
10	Stuffing Box Spring	25	Trap Cover Gasket
11	Valve Plug & Stem	26	Trap Valve Seat Gasket
12	Valve Bonnet Gasket	27	Trap Valve Seat
13	Bolt	28	Trap Cover Bolt
14	Nut	29	Nameplate
15	Main Valve Seat	30	Silencer

Dimensions

Installation Guidelines

• Blowdown: Blowdown is especially important for newly installed piping or after system shutdown. This reduces operation failure caused by condensate or foreign matter.
• Installation Angle: Install the product vertically, so that the arrow mark on the body points horizontally in the direction of flow. Allowable inclination is 10 degrees in the fore-aft direction and 15 degrees in the plane perpendicular to the flow line.
• Piping Support: Install the product avoiding excessive load, bending, and vibration. Support the inlet and outlet pipes securely.
• Motive Air Quality: Supply to the actuator only clean air that does not contain water, oil, or foreign matter. Installation of an optional air filter regulator and mist separator is recommended.

Troubleshooting

Valve Section

Problem	Cause	Remedy
Valve Leakage	Pressure of air supply to actuator/positioner is too high	Adjust air supply pressure to match specifications
	Positioner's zero point is miscalibrated	Adjust positioner's zero point
	Inlet pressure is too high	Decrease inlet pressure to PMO or less
	Valve plug and valve seat are off-center	Reassemble valve bonnet section correctly
	Problem with sealing surfaces of plug and seat	Replace with new valve plug & stem and valve seat

Steam Trap Section

Problem	Cause	Remedy
Steam is blowing	Build-up of dirt on trap valve seat or float	Clean or replace trap valve seat or float
	Body is installed tilted	Correct the installation
	Float is deformed	Replace with a new float
No condensate is discharged	Primary pressure exceeds trap maximum working pressure	Decrease inlet pressure to PMO or less
	Water is inside the float	Replace with a new float
	Output piping or trap valve seat is clogged	Clean or modify piping/seat