TLV FP46UC is a universal thermodynamic disc steam trap with thermostatic air venting. The FP46UC steam trap (connector body unit F46 or former connector body unit F32 and steam trap unit P46UC) can be used without adjustment for medium capacity applications between 0.03 and 4.6 MPaG (5 and 650 psig), such as steam mains, tracers, and coils. The trap discharges condensate at a temperature slightly lower than saturation temperature.

Features

• Inline replaceable and cleanable 2-bolt universal flange steam trap with high air venting capability.
• Two-bolt flange connector, replaceable trap unit and module valve seat permit replacement in minutes without disturbing piping.
• Universal flange allows trap to be positioned in the correct attitude, regardless of pipeline configuration.
• Screen located in connector ensures trouble-free operation.
• Air jacketing reduces cycling and extends life.
• Quick thermostatic air venting with bimetal ring for fast start-up.
• Lapped disc provides steam-tight seal without air binding.
• Hardened stainless steel working surfaces.

Specifications

Connection	Screwed	Socket Welded	Flanged
Size	1/2", 3/4", 1"	DN 15, 20, 25	DN 15, 20, 25
Maximum Operating Pressure (PMO)	4.6 MPaG	4.6 MPaG	4.6 MPaG
Minimum Operating Pressure	0.03 MPaG	0.03 MPaG	0.03 MPaG
Maximum Operating Temperature (TMO)	400 °C / 425 °C	400 °C / 425 °C	400 °C / 425 °C
Maximum Allowable Pressure (PMA)	6.6 MPaG @ 40 °C	6.6 MPaG @ 40 °C	6.6 MPaG @ 40 °C
Maximum Allowable Temperature (TMA)	400 °C / 425 °C @ 5.0 MPaG	400 °C / 425 °C @ 5.0 MPaG	400 °C / 425 °C @ 5.0 MPaG
Maximum Back Pressure	80% of Inlet Pressure	80% of Inlet Pressure	80% of Inlet Pressure
Connector Unit	F46	F46	F46
Trap Unit	P46UC	P46UC	P46UC

INFO

Designed for use with F46, F32 Connector Units and V1/V2 Trap Stations. Trap and Connector Units sent as separate units for flexible installation.

Materials

No.	Description	Material	DIN	ASTM/AISI
1	Trap Body	Cast Stainless Steel A351 Gr.CF8	1.4312	-
2	Connector Body	Cast Stainless Steel A351 Gr.CF8	1.4312	-
3	Screen inside/outside	Stainless Steel SUS304/430	1.4301/1.4016	AISI304/430
4	Screen Holder Gasket	Stainless Steel SUS316L	1.4404	AISI316L
5	Screen Holder	Cast Stainless Steel A351 Gr.CF8	1.4312	-
6	Connector Flange	Carbon Steel A105	1.0460	-
7	Snap Ring	Carbon Steel SWRH57	1.0535	AISI1055
8	Outer Connector Gasket	Graphite/Stainless Steel SUS304	- /1.4301	-/AISI304
9	Inner Connector Gasket	Graphite/Stainless Steel SUS304	- /1.4301	-/AISI304
10	Connector Bolt	Carbon Steel SNB7	1.7225	A193 Gr.B7
11	Module Valve Seat	Stainless Steel SUS420F	1.4028	AISI420F
12	Cover	Stainless Steel A182 F304	1.4301	-
13	Disc	Stainless Steel SUS420J2	1.4031	AISI420
14	Disc Holder Ring	Stainless Steel SUS420J2	1.4031	AISI420
15	Air Vent Ring	Bimetal	-	-
16	Outer Module Gasket	Graphite/Stainless Steel SUS316L	- /1.4404	-/AISI316L
17	Nameplate	Stainless Steel SUS304	1.4301	AISI304
18	Inner Module Gasket	Graphite/Stainless Steel SUS316L	- /1.4404	-/AISI316L
19	Cap	Stainless Steel SUS304	1.4301	AISI304
20	Connector Nameplate	Stainless Steel SUS304	1.4301	AISI304
21	Flange	Cast Stainless Steel A351 Gr.CF8/Stainless Steel SUS304	1.4312/1.4301	-/AISI304

Dimensions

Screwed

Size	L (mm)	W (mm)	W1 (mm)	Weight (kg)
1/2"	80	168	104	1.7
3/4"	80	168	104	1.7
1"	96	172	110	2.0

Socket Welded

DN	L (mm)	W (mm)	W1 (mm)	φD (mm)	φC (mm)	h (mm)	Weight (kg)
15	80	168	104	36	21.8	12	1.7
20	80	168	104	36	27.2	14	1.7
25	96	172	110	44	33.9	14	2.0

Flanged

DN	L (DIN 2501 PN25/40)	L (ASME 150RF)	L (ASME 300RF)	L (ASME 600RF)	W (mm)	W1 (mm)	Weight (kg)
15	150	150	150	180	170	105	3.4
20	150	150	150	180	170	105	4.2
25	160	160	160	190	170	105	4.7

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

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.

1. In some instances, the trap unit and the connector body are sent as separate units. When attaching them together, make sure the connector gaskets are still in place after having removed their protective seal.
2. There are no restrictions on the installation direction beyond the following conditions: a) The arrow on the connector body must point in the direction of condensate flow. b) The connector body must be adjusted so that the connector flange face (for connecting to the trap unit) is in the vertical plane. c) The nameplate on the trap unit must face upward.
3. Before installation, be sure to remove all protective seals.
4. Before installing the trap, blow out the inlet piping to remove all dirt and oil.
5. 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.
6. Support the pipes properly within 800 mm (2.5 ft) on either side of the trap.
7. Install a bypass valve to discharge condensate, and inlet and outlet valves to isolate the trap in the event of trap failure or maintenance.
8. Install a check valve at the trap outlet whenever more than one trap is connected to the condensate collection pipeline.
9. 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).
10. We recommend unions to facilitate connection and disconnection of screwed models.

Installation Examples: Horizontal Piping

Installation Examples: Vertical Piping

Troubleshooting

Problem	Cause	Remedy
No condensate is discharged (blocked, or discharge is poor)	Screen is clogged with rust or scale	Clean
	Air vent ring (bimetal) is broken or worn, causing air-binding	Replace air vent ring
	Disc holder ring is broken or worn, causing air-binding	Replace disc holder ring
	Disc is sticking to valve seat (due to oil, etc.)	Clean
	Steam-locking has occurred	Perform a bypass blowdown, or close the trap inlet valve and allow the trap to cool. Piping correction may also be required.
	Trap capacity is insufficient	Change to trap of suitable capacity
	Differential pressure is low	Study inlet/outlet pressure, including rise in outlet pipe
Steam leakage or blowing (from valve seat)	Valve closure is obstructed by scale, etc.	Clean or replace screen
	Disc or valve seat is worn	Replace worn parts
	Air vent ring (bimetal) or disc holder ring is broken, obstructing valve closure	Replace air vent ring or disc holder ring
	Back pressure exceeds allowable value	Use within pressure range
	Trap is being used below minimum operating pressure	Use within pressure range
	Disc is sticking to top of cover (due to oil, etc.)	Clean
Valve chattering (Leakage)	Foreign matter or oil film on disc or valve seat	Clean
	Scratches on disc or valve seat	Replace disc, valve seat, or trap unit
	Disc or valve seat is worn	Replace disc, valve seat, or trap unit
Leakage from a location other than valve seat	Bypass valve is damaged or open	Replace or close bypass valve
	Cover is loose or module gaskets are damaged	Tighten cover or replace module gaskets
	Cover is loose or sealing surface between cover and valve seat is damaged	Tighten or replace cover, or replace valve seat
	Connector bolts are loose or connector gaskets are damaged	Tighten connector bolts or replace connector gaskets
	Inlet and discharge channels may be connected, due to erosion	Replace trap (study trap capacity)
	Screen holder is loose or screen holder gasket is damaged	Tighten screen holder or replace screen holder gasket