The TLV P21S ver.C is a compact thermodynamic disc steam trap purpose-built for troublesome copper tracing applications and small capacity applications. It can be used without adjustment for small capacity applications between 0.025 and 2.1 MPaG (3.5 and 300 psig).

Configuration

No.	Description	Maintenance Kit (M)	Repair Kit (R)
1	Body	-	-
2	Cover	-	√
3	Disc	-	√
4	Screen	-	√
5	Screen Holder Gasket	√	√
6	Screen Holder	-	-
7	Cap	-	√
8	Nameplate	-	√

Replacement parts are available only in their respective kits.

Specifications

WARNING

To avoid malfunctions, product damage, accidents or serious injury, install properly and DO NOT use this product outside the specification range. Local regulations may restrict the use of this product to below the conditions quoted.

• Minimum Operating Pressure:
  • Horizontal: 0.025 MPaG (3.5 psig) (0.25 barg)
  • Vertical: 0.04 MPaG (6 psig) (0.4 barg)
• Maximum Allowable Back Pressure: 80% of inlet pressure

Maximum allowable pressure (PMA) and maximum allowable temperature (TMA) are PRESSURE SHELL DESIGN CONDITIONS, NOT OPERATING CONDITIONS.

Exploded View

Tightening Torque and Distance Across Flats

Part	Torque N·m (lbf·ft)	Distance Across Flats mm (in)
Cover	120 (88)	36 (1 13/32)
Screen Holder	40 (29)	17 (21/32)

Proper Installation

TIP

Installation, inspection, maintenance, repairs, disassembly, adjustment and valve opening/closing should be carried out only by trained maintenance personnel.

1. The trap can be installed either horizontally or vertically, but make sure the arrow on the trap points in the direction of flow.
2. Before installation, be sure to remove all protective seals.
3. Before installing the trap, blow out the inlet piping to remove all dirt and oil.
4. Install the trap in the lowest part of the pipeline or equipment so the condensate flows naturally into the trap by gravity. The inlet pipe should be as short and have as few bends as possible.
5. Support the pipes properly within 800 mm (2.5 ft) on either side of the trap.
6. Install a bypass valve to discharge condensate, and inlet and outlet valves to isolate the trap in the event of trap failure or maintenance.
7. Install a check valve at the trap outlet whenever more than one trap is connected to the condensate collection pipeline.
8. In order to avoid excessive back pressure, make sure the discharge pipes are large enough; (the outlet back pressure allowance should be no more than 80% of the inlet steam pressure).
9. We recommend unions to facilitate connection and disconnection of the trap.

Piping Arrangement

Check to make sure that the pipes connected to the trap have been installed properly.

Requirement	Correct	Incorrect	Reason
Install a catchpot of the proper diameter.			Diameter is too small.
Make sure the flow of condensate is not obstructed.			Diameter is too small and inlet protrudes into pipe.
To prevent rust and scale from flowing into the trap, connect the inlet pipe 25 - 50 mm (1 - 2 in) above the base of the T - pipe.			Rust and scale flow into the trap with the condensate.
When installing on the blind end, make sure nothing obstructs the flow of condensate.			Condensate collects in the pipe.

Operational Check

A visual inspection can be carried out to aid in determining the necessity for immediate maintenance or repair, if the trap is open to atmosphere.

Status	Description
Normal:	Condensate is discharged in a short blast followed by a longer period of no drainage. During the discharge, flash steam may be seen. A small amount of flash steam may be visible after the discharge.
Blocked:	No condensate is discharged. The trap is quiet and makes no noise. The surface temperature of the trap is low.
Blowing:	Live steam continually flows from the outlet, and there is a continuous metallic sound.
Steam Leakage:	Live steam is discharged through the trap outlet together with condensate, accompanied by a high-pitched sound.
Chattering:	The trap does not close properly. Steam is discharged from the trap in short rapid bursts.

Inspection and Maintenance

Operational inspections should be performed at least twice per year, or as called for by trap operating conditions. Steam trap failure may result in temperature drop in the equipment, poor product quality or losses due to steam leakage.

Parts Inspection Procedure

Part	Inspection
Body, Cover	Check inside for damage, dirt, grease, oil film, rust or scale
Gaskets	Check for warping or damage
Screen	Check for clogging or corrosion damage
Disc	Check for damage or wear
Valve Seat Surface inside Cover	Check for damage or wear

Disassembly / Reassembly

Part & No.	Disassembly	Reassembly
Cover 2	Remove with a socket wrench. Cap is not removable as it is riveted to the cover	Coat threads with anti-seize, then tighten to the proper torque
Disc 3	Remove, being careful not to scratch the lapped surface	Make sure that the seat surface (the lapped side) is facing down, toward the valve seat
Screen Holder 6	Remove with a socket wrench	Coat threads with anti-seize, then tighten to the proper torque
Screen Holder Gasket 5	Remove gasket and clean sealing surfaces	Replace with a new gasket, coat surfaces with anti-seize
Screen 4	Remove without bending	Reinsert without bending

Instructions for Disassembly and Reassembly

The seal on the threaded plugs/holders found on TLV products is formed by a flat metal gasket.

1. Remove the plug/holder using a tool of the specified size (distance across flats).
2. The gasket should not be reused. Be sure to replace it with a new gasket.
3. Clean the gasket surfaces of the plug/holder and the product body using a rag and/or cleaning agents, then check to make sure the surfaces are not scratched or deformed.
4. Coat both the gasket surface of the plug/holder and the threads of the plug/holder with anti-seize, then press the gasket onto the center of the gasket surface of the plug/holder.
5. Hold the plug/holder upside down to make sure that the anti-seize makes the gasket stick to the plug/holder even when the plug/holder is held upside down.
6. Screw the plug/holder by hand into the product body while making sure that the gasket remains tightly affixed to the center of the gasket surface of the plug/holder.
7. Tighten the plug/holder to the proper torque.

8. Next, begin the supply of steam and check to make sure there is no leakage from the part just tightened.

Troubleshooting

If the expected performance is unachievable after installation of the trap, check the following points for appropriate corrective measures.

Problem	Cause	Remedy
No condensate is discharged (blocked) or discharge is poor	Screen is clogged with rust or scale Disc is sticking to valve seat Steam-locking has occurred Trap capacity is insufficient Differential pressure is low	Clean Clean Perform a bypass blow-down, or close the trap inlet valve Change to trap of suitable capacity Study inlet/outlet pressure
Steam leakage or blowing (from valve seat)	Valve closure is obstructed by scale, etc. Disc or valve seat is worn Back pressure exceeds allowable value Trap is being used below minimum operating pressure Disc is sticking to top of cover	Clean or replace screen Replace worn parts Use within pressure range Use within pressure range Clean
Valve chattering (Leakage)	Foreign matter or oil film on disc or valve seat Scratches on disc or valve seat Disc or valve seat is worn	Clean Replace disc or trap Replace disc or trap
Leakage from a location other than valve seat	Bypass valve is damaged or open Cover is loose or sealing surface between cover and body is damaged Screen holder is loose or screen holder gasket is damaged	Replace or close bypass valve Tighten cover, or replace trap Tighten screen holder or replace screen holder gasket

Optional Blowdown Valve BD1

The BD1 Blowdown Valve, installed in place of the screen holder, uses internal pressure to blow out condensate/steam, dirt and scale to the atmosphere.

WARNING

Do not tighten the BD1 valve or the BD1 valve seat in excess of the appropriate tightening torque. Over-tightening may cause breakage to threaded portions, which may cause burns other injuries or damage.

Reassembly of Blowdown Valve

1. Clean the trap, BD1 threads, and sealing surfaces, and apply a small amount of anti-seize.
2. Replace gasket.
3. Carefully place the gasket over the threaded portion, and position carefully so that it does not become off-center.
4. Fasten to the steam trap with the proper torque.

Operation Instructions for BD1

DANGER

Always wear eye protection and heat-resistant gloves when operating the blowdown valve. Failure to do so may result in burns or other injury.

1. With two wrenches, firmly hold the BD1 valve seat (screen holder) (17 mm) in place while slowly opening the BD1 valve (14 mm). Be careful to avoid contact with fluid that will be discharged through the hole in the center of the blowdown valve as the valve opens.
2. Close the BD1 valve and tighten to a torque of 11 N·m (8 lbf·ft), and confirm that there is no leakage.