TLV FL21 and FL32 QuickTrap are universal balanced pressure thermostatic steam traps featuring a "fail open" design. They are equipped with an inline replaceable and cleanable two-bolt universal flange and offer high air venting capability. These models are highly suitable for steam-using equipment that discharges condensate at temperatures slightly below saturation temperature, such as steam mains, tracer lines, dryers, and light process heaters.

The FL Series steam traps (connector body unit F46 or former connector unit F32 and steam trap units L21, L32 as well as L21-C, L32-C with built-in check valve) can be used without adjustment for medium capacity applications up to 2.1 or 3.2 MPaG (300 or 450 psig).

Features

1. Two-bolt flange connector permits trap replacement or cleaning in minutes without disturbing piping.
2. Universal flange allows trap to be positioned in the correct attitude, regardless of pipeline configuration.
3. Patented "fail open" feature for critical service.
4. Rugged yet light construction withstands superheat and water hammer.
5. Cyclic operation with fixed subcooling throughout the whole pressure range.
6. Built-in screens in connector and trap body protect and keep trap module replacement costs low.
7. Easily cleanable and repairable design.
8. Hardened stainless steel valve head and seat.
9. Models FL21-C and FL32-C with built-in check valve available upon request.

WARNING

To avoid abnormal operation, accidents or serious injury, DO NOT use this product outside of the specification range. Local regulations may restrict the use of this product to below the conditions quoted.

Specifications and Materials

No.	Description	Material	DIN*	ASTM/AISI*
1	Trap Body	Cast Stainl. Steel A351/A351M Gr.CF8	1.4312	—
2	Connector Body	Cast Stainl. Steel A351/A351M Gr.CF8	1.4312	—
3	Connecting Flange	Carbon Steel A105/A105M	1.0460	—
4	Snap Ring	Carbon Steel SWRH57	1.0535	AISI1055
5	Outer Connector Gasket	Graphite/Stainl. Stl. SUS304	-/1.4301	-/AISI304
6	Inner Connector Gasket	Graphite/Stainl. Stl. SUS304	-/1.4301	-/AISI304
7	Valve Seat	Stainless Steel SUS420F	1.4028	AISI420F
8	Trap Cover	Carbon Steel A105/A105M	1.0460	—
9	Cover Gasket	Graphite/Stainl. Stl. SUS316L	-/1.4404	-/AISI316L
10	Screen inside/outside	Stainless Steel SUS304/430	1.4301/1.4016	AISI304/430
11	Screen Holder Gasket	Stainless Steel SUS316L	1.4404	AISI316L
12	Screen Holder	Cast Stainl. Steel A351/A351M Gr.CF8	1.4312	—
13	X-element	Stainless Steel	—	—
14	X-element Guide	Stainless Steel SUS304	1.4301	AISI304
15	Nameplate	Stainless Steel SUS304	1.4301	AISI304
16	Spring Clip	Stainless Steel SUS304	1.4301	AISI304
17	Cover Bolt	Alloy Steel A193/A193M Gr.B7	1.7225	—
18	Trap Screen	Stainless Steel SUS304	1.4301	AISI304
19	Connector Bolt	Alloy Steel SNB7	1.7225	A193/A193M Gr.B7
20	Connector Nameplate	Stainless Steel SUS304	1.4301	AISI304
21	Flange	Cast Stainl. Steel A351/A351M Gr.CF8 / SUS304	1.4312 / 1.4301	— / AISI304
22	Steel Ball (Check Valve)	Stainless Steel SUS440C	1.4125	AISI440C

*Equivalent materials.

Dimensions

FL21/FL32 Screwed

Size	L (mm)	W (mm)	W1 (mm)	Weight (kg)
1/2"	80	169	105	1.8
3/4"	80	169	105	1.8
1"	96	171	109	2.1

*BSP DIN 2999, other standards available.

FL21/FL32 Socket Welded

DN	L (mm)	W (mm)	W1 (mm)	φD (mm)	φC (mm)	h (mm)	Weight (kg)
15	80	169	105	36	21.8	12	1.8
20	80	169	105	36	27.2	14	1.8
25	96	171	109	44	33.9	14	2.1

*ASME B16.11-2005, other standards available.

FL21/FL32 Flanged

DN	L (DIN 2501 PN25/40)	L (ASME 150RF)	L (ASME 300RF)	L (ASME 600RF)	W	W1	Weight* (kg)
15	150	150	150	180	169	105	3.4
20	150	150	150	180	169	105	4.3
25	160	160	160	190	169	105	4.8

*Weight is for DIN PN 25/40. Other standards available, but length and weight may vary.

Discharge Capacity

1. Differential pressure is the difference between the inlet and outlet pressure of the trap.
2. Recommended safety factor: at least 2.

Installation and Piping

There are no restrictions on the installation direction beyond the following conditions:

1. The arrow on the connector body must point in the direction of condensate flow.
2. The connector body must be adjusted so that the connector flange face (for connecting to the trap unit) is in the vertical plane.
3. The nameplate on the trap unit must face upward.

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.

Installation Examples

Horizontal Piping

Vertical Piping

Inspection and Maintenance

Operational inspections should be performed at least twice per year, or as called for by trap operating conditions. Faulty steam traps may result in losses due to steam leakage.

Troubleshooting

Problem	Cause	Remedy
Condensate is not discharged or (blocked) discharge is poor	X-element is stuck to the valve seat	Clean
	Screens and/or inlet/outlet channels are clogged with rust or scale	Clean
	Steam-locking	Study piping
	Trap operating pressure exceeds maximum specified operating pressure	Study inlet pressure
	Differential pressure is insufficient	Study inlet/outlet pressure
Steam leakage or blow-off	Valve closure is obstructed by rust or scale, etc	Clean (inspect screens as well)
	X-element and/or valve seat are worn or damaged	Replace X-element and/or valve seat
	X-element is broken	Replace X-element
	Severe vibration of trap	Reinforce trap piping supports
Leakage from another location	Gaskets of connector, trap cover, screen holder or valve seat are worn or damaged	Repair gaskets
	Cover bolts, connector flange bolts, screenholder, or valve seat are loose	Tighten to proper torque
	Inlet and discharge channels may be connected due to erosion	Replace trap (study trap capacity)
	Bypass valve is open or damaged	Repair or close valve