TLV SCOSR-16 is a technologically-advanced compact pilot-operated pressure reducing valve designed for accurate control in process steam systems. It features a self-aligning, shock-absorbing spherical piston and an advanced pilot regulator design that maintains secondary steam pressure accuracy even during adverse process conditions. Note: The source manual also covers the related SCOS-16 model, which includes a built-in cyclone separator and steam trap.

Key Features

1. Self-aligning shock-absorbing spherical piston and advanced pilot regulator designs maintain secondary steam pressure accuracy, even during adverse process conditions.
2. Major internal components made of stainless steel for long service life.
3. Large surface area integral screen for pilot valve extends trouble-free service.
4. Internal secondary pressure-sensing channel makes external sensing lines unnecessary.
5. (SCOS-16 model only) Built-in separator, with condensate separation efficiency as high as 98%, a self-modulating free float steam trap and a large screen to protect the main valve.

Specifications

Model	SCOS-16	SCOSR-16
Connection	Screwed	Screwed
Size	1/2", 3/4", 1"	1/2", 3/4", 1"
Body Material	Bronze	Bronze
Maximum Operating Pressure (PMO)	16 barg	16 barg
Maximum Operating Temperature (TMO)	220 °C	220 °C
Primary Pressure Range	2 – 16 barg	2 – 16 barg
Adjustable Pressure Range	Within 10 – 84% of primary pressure (min. 0.3 barg). Differential pressure between 0.7 – 8 bar.	Within 10 – 84% of primary pressure (min. 0.3 barg). Differential pressure between 0.7 – 8 bar.
Minimum Adjustable Flow Rate	10% of rated flow rate	10% of rated flow rate

CAUTION

Install properly and DO NOT use this product outside the recommended operating pressure, temperature and other specification ranges. DO NOT use the product in excess of the maximum operating pressure differential. Such use could make discharge through the steam trap impossible (blocked).

Cv & Kvs Values

Nominal Valve Size	1/2"	3/4"	1"
Kvs (DIN)	1.0	1.3	1.5
Cv (UK)	1.0	1.2	1.5
Cv (US)	1.2	1.5	1.8

Configuration

The SCOSR-16 configuration consists of the following key parts:

No.	Part Name	No.	Part Name
1	Main Body	11	Diaphragm
2	Cover Plug	12	Pilot Screen
3	Screen	13	Pilot Screen Holder
4	Main Valve Seat	14	Diaphragm Support
5	Main Valve	15	Coil Spring
6	Piston	16	Spring Housing
7	Cylinder	17	Adjustment Screw
8	Pilot Body	18	Adjustment Handle
9	Pilot Valve Stem	19	Plug
10	Pilot Valve Seat

Installation Guidelines

Recommended Straight Pipe Runs

To ensure stable steam flow, it is recommended that the product be installed on straight runs of piping (where d = pipe diameter):

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

Piping Support: Install the product, paying attention to avoid excessive load, bending and vibration. Support the inlet and outlet pipes securely.

Accessories: Always install a shut-off valve, pressure gauge and bypass line at both inlet and outlet. Ball valves, which will not retain condensate, are recommended for inlet and outlet shut-off valves.

Operational Check and Maintenance

To ensure long service life of the product, the following inspection and maintenance should be performed regularly:

Part Name	Inspection and Maintenance Frequency
Screens (Separator and Pilot)	Disassemble and clean annually. If there is substantial blockage, install a strainer (approx. 60 mesh) ahead of the product.
Main Valve, Pilot Valve & Seats	Replace after approximately 15,000 hours.
Piston Ring	Replace after approximately 8,000 hours.
Piston & Diaphragm	Replace after approximately 30,000 hours.

Troubleshooting

If there is any problem encountered in the operation of the product, consult the following guide:

• Secondary pressure does not rise: Check if no steam is being supplied or the inlet valve is closed. Check if the screens or strainer are clogged, and clean or blow down.
• Secondary pressure cannot be adjusted or increases abnormally: The pilot screen or the small hole on the piston may be clogged. The piston ring or diaphragm may be worn or damaged. Flow rate may exceed the rated flow rate.
• Hunting (fluctuation of the secondary pressure): The selected model may be inappropriate for the service conditions (e.g., oversized).
• Chattering (heavy mechanical noise): The straight pipe run might be too short, or the primary pressure drop is too large.