TLV TATSU2 is a large-capacity air trap designed to automatically drain highly viscous oil and condensate from compressed air systems. Recommended installations include receiver tanks, after coolers, and air mains. Its unique design allows self-cleaning of the trap interior during each discharge cycle, and the large size orifice eliminates problems due to dirt and oil accumulation.

Features

1. Unique design allows self-cleaning of the trap interior during each discharge.
2. Large size orifice eliminates problems due to dirt and oil accumulation.
3. Pilot valve supported by coil spring reduces wear of the sealing surface.
4. Y-strainer and blow down valve allow cleaning during operation to ensure trouble-free service.
5. Internal parts are made of stainless steel or other non-corrosive materials.
6. Optional flow indicator at the trap inlet is available to verify condensate flow.

Specifications

Model	TATSU2
Connection	Screwed
Size (mm)	25
Maximum Operating Pressure (PMO)	1.0 MPaG
Maximum Differential Pressure (ΔPMX)	1.0 MPa
Minimum Differential Pressure	0.2 MPa
Maximum Operating Temperature (TMO)	80°C
Applicable Fluids*	Air

• Do not use for toxic, flammable or otherwise hazardous fluids.

PRESSURE SHELL DESIGN CONDITIONS (NOT OPERATING CONDITIONS)

Maximum Allowable Pressure (PMA): 1.0 MPaG Maximum Allowable Temperature (TMA): 150°C

Materials

No.	Description	Material	JIS	ASTM/AISI*
1	Body	Cast Iron	FC250	A126 Cl.B
2	Cover	Cast Iron	FC250	A126 Cl.B
3	Outlet Union	Cast Iron	FC250	A126 Cl.B
4	Float Cover	Polypropylene	PP	PP
5	Float	Stainless Steel	SUS316L	AISI316L
6	Float Holder	Polypropylene	PP	PP
7	Main Valve Seat	Stainless Steel	SUS303	AISI303
8	Piston	Stainless Steel	SUS303	AISI303
9	Pilot Valve Seat	Fluorine Resin	PTFE	PTFE
10	Main Valve	Nitrile Rubber/Stainl. Stl.	NBR/SUS304	D2000BF/AISI304
11	Pilot Valve	Nitrile Rubber/Stainl. Stl.	NBR/SUS303	D2000BF/AISI303
12	Cover Gasket	Fiber-Rubber Compound	—	—
13	Outlet Union Gasket	Fiber-Rubber Compound	—	—
14	Cover Bolt	Cr-Mo Steel	SMC435	AISI4135
15	Trap Support	Carbon Steel	SS400	A6
16	Outlet Elbow	Malleable Cast Iron	FCMB270	A47 Gr.32510
17	Nipple	Malleable Cast Iron	FCMB270	A47 Gr.32510
18	Y-Strainer	Cast Stainless Steel	—	A351 Gr.CF8
19	Strainer Blow Valve	Malleable Cast Iron	FCMB270	A47 Gr.32510
20	Foundation Bolt/Nut	Carbon Steel	SS400	A6

• Equivalent

Dimensions

Size	H**	H1**	H2	φW	Weight (kg)
25	495	354	250	255	21

• Rc(PT), other standards available
• *** Approximate dimensions*

Discharge Capacity

1. Differential pressure is the difference between the inlet and outlet pressure of the trap.
2. The chart is applicable to condensate below 80°C.
3. The discharge capacity is for a liquid with specific gravity of 1.
4. Recommended safety factor: at least 1.5.

Operation

1. Condensate and oil flow into and accumulate in the trap.

2. When the condensate level in the trap body rises to a certain point, the floats (B) rise. This, together with the help of the coil spring (E), lifts the float holder, causing the pilot valve (D) to open.

3. When the pilot valve (D) opens, compressed air (primary side) enters the pressure chamber (G) and pushes the piston (C) down, opening the main orifice (F) to discharge condensate and oil. The pressure inside the float cover (A) is lower than that outside, so the condensate outside the float cover discharges first, after which the condensate inside the float cover discharges. As the condensate inside the float cover discharges, some pressurized air will discharge with the condensate to flush out any oil or dirt in the trap and provide a self cleaning action.

4. When the condensate has been discharged, the floats (B) fall, causing the pilot valve orifice (D) to close. When the pilot valve orifice (D) closes, the pressure in the pressure chamber (G) is released to the outlet and the piston (C) rises to close the main valve orifice (F).

Note: In this manner, inflowing condensate is intermittently discharged.

Configuration

No.	Name	No.	Name	No.	Name	No.	Name
1	Body	12	Spring Holder	23	Snap Ring	34	Elbow
2	Cover	13	Main Valve	24	Valve Seat Gasket	35	Mounting Base
3	Outlet Union	14	Pilot Valve	25	Cover Bolt	36	Anchor Bolt
4	Float Cover	15	Snap Ring	26	Outlet Union Bolt	37	Anchor Nut
5	Bottom Plate	16	Pilot Valve Support Plate	27	Castle Nut	38	Caution Faceplate
6	Piston Guide	17	Outlet Union Gasket	28	Split Pin	39	Caution Faceplate
7	Float	18	Cover Gasket	29	Spring Washer	40	Nameplate
8	Float Holder	19	Slide Ring	30	Balancing Line Plug	41	Y-Strainer
9	Main Valve Seat	20	Main Valve O-Ring	31	Sealing Spring	42	Pipe
10	Piston	21	Piston Guide O-Ring	32	Opening Spring	43	Globe Valve
11	Pilot Valve Seat	22	Piston O-Ring	33	Nipple

Installation & Pressure-Balancing Line

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.

This air trap is designed to automatically and intermittently discharge inflowing condensate. However, if the condensate completely fills the inlet path to the trap, air in the trap body will not be able to escape, preventing displacement by condensate, and thus preventing condensate from entering the trap. This phenomenon is called air binding. A pressure-balancing line installed between the trap cover and the dry portion of the receiver tank is used to prevent this phenomenon from occurring.

Note: Be sure to connect the pressure-balancing line to an area with the same pressure or to an air section downstream of the flow medium.

Troubleshooting

When the product fails to operate properly, use the following table to locate the cause and remedy.

Problem	Cause	Remedy
No condensate is discharged (blocked) or discharge is poor	The pilot valve seat is clogged with scale	Clean parts
	There is a build-up of scale between the piston and the main valve seat	Clean parts
	There is a build-up of rust or scale between the float holder and the piston guide	Clean parts
	The trap has the wrong number of floats (requires 4), or the floats are damaged or full of condensate	Inspect and replace if necessary
	The vent hole in the float cover is clogged with rust and scale	Clean parts
	The pressure-balancing line is clogged with rust and scale	Clean parts
	The opening spring is broken	Inspect and replace if necessary
Air and/or condensate leaks from the outlet between discharge cycles (air leakage)	Scale has built up on the pilot valve seat or valve or the seating surfaces are scratched, crushed or worn	Clean or replace parts
	Scale has built up on the main valve seat or main valve or the seating surfaces are scratched, crushed or worn	Clean or replace parts
	The trap is subjected to direct heavy vibration from the compressor	Inspect and anchor if necessary
	The sealing surfaces of an O-ring are scratched or damaged	Inspect and replace if necessary
Air is blowing and the valve does not close (blowing)	There is a build-up of sticky scale between the float holder and the piston guide	Clean parts
	The orifice of the piston is clogged with scale	Clean parts
	Scale has built up on the pilot valve seat	Clean parts
	The sealing spring is broken	Inspect and replace if necessary
Air is leaking from a place other than the outlet	Gaskets are deteriorated or damaged	Replace with new gasket(s)
	Improper tightening torques were used	Tighten to the proper torque