Description

The TDC46M is a carbon steel, thermodynamic steam trap that has been specifically designed for low capacity applications up to 46 bar g (667 psi g) (where pipe connections permit). As standard the unit is available with either screwed, socket weld or flanged connections.

TDC46M Benefits

• Integral strainer: Protects internals from system debris.
• Integral air vent: Ensures rapid start-up and prevents air binding.
• Insulation cap: Reduces energy loss and protects against environmental conditions.
• Replaceable seat: Allows for easy maintenance without removing the trap from the line.

Optional Extras

At extra cost a BDV1 integral blowdown valve can be pre-fitted to the strainer cap, please specify at the time of order placement.

Standards & Certification

This product fully complies with the requirements of the European Pressure Equipment Directive 2014/68/EU. Certification to EN 10204 3.1 is available upon request.

Sizes and Pipe Connections

• Screwed: ½", ¾" and 1" BSP or NPT.
• Socket weld: ½", ¾" and 1" ends to BS 3799 Class 3000 lb.
• Flanged: DN15, DN20 and DN25 integrally flanged EN 1092 PN40 and PN100, ASME Class 150, Class 300 and Class 600.

Materials

No.	Part	Material	Standard
1	Body	Carbon steel	1.0619+N / ASTM A216 WCB
2	Top cap	Stainless steel	1.4301 / ASTM 479 304
3	Insulating cover	Stainless steel	EN 10088-1 1.4301
4	Disc	Hardened steel	1.2379
5	Seat	Hardened steel	1.2379
6	Bimetal ring	Bimetal
7	Support	Stainless steel	AISI 304
8	Seat gasket	Graphite foil
9	Strainer screen	Stainless steel	ASTM A478 316L
10	Strainer cap gasket	Stainless steel	AISI 304
11	Strainer cap	Stainless steel	1.4308 / ASTM A351 CF8

Pressure / Temperature Limits (ISO 6552)

Screwed and Socket Weld

Body design condition	PN100 and ASME Class 600
PMA Maximum allowable pressure	100 bar g @ 50 °C	1450 psi g @ 122 °F
TMA Maximum allowable temperature	425 °C @ 57.5 bar g	797 °F @ 834 psi g
Minimum allowable temperature	-29 °C	-20.2 °F
PMO Maximum operating pressure	46 bar g @ 425 °C	667 psi g @ 797 °F
TMO Maximum operating temperature	425 °C @ 46 bar g	797 °F @ 667 psi g
Minimum operating temperature	0 °C	32 °F
Minimum operating pressure	1.5 bar g	22 psi g
Maximum operating backpressure	80% of upstream pressure
Designed for cold hydraulic test pressure	150 bar g	2176 psi g

Flanged PN40 and PN100

Body design condition	PN40	PN100
PMA Maximum allowable pressure	40 bar g @ 50 °C	100 bar g @ 50 °C
TMA Maximum allowable temperature	400 °C @ 23.8 bar g	400 °C @ 59.5 bar g
PMO Maximum operating pressure	31.1 bar g @ 238 °C	46 bar g @ 400 °C
TMO Maximum operating temperature	400 °C @ 23.8 bar g	400 °C @ 46 bar g

Flanged ASME Class 150, 300 and 600

Body design condition	ASME Class 150	ASME Class 300	ASME Class 600
PMA Max allowable pressure	19.6 bar g @ 38 °C	51.1 bar g @ 38 °C	99.3 bar g @ 38 °C
TMA Max allowable temperature	425 °C @ 5.5 bar g	425 °C @ 28.8 bar g	425 °C @ 56 bar g
PMO Max operating pressure	14 bar g	43 bar g	46 bar g
TMO Max operating temperature	425 °C @ 5.5 bar g	425 °C @ 28.8 bar g	425 °C @ 46 bar g

Dimensions and Weights

(approximate) in mm (and inches)

Size	A	Screwed	Socket weld	Flanged PN40/ASME	Flanged PN100	C	D	E (Withdrawal)	F (Withdrawal)
1/2" (DN15)	58 (2.28)	78 (3.07)	92 (3.62)	150 (5.91)	210 (8.27)	61 (2.40)	59 (2.32)	40 (1.57)	30 (1.18)
3/4" (DN20)	61 (2.40)	95 (3.74)	92 (3.62)	150 (5.91)	210 (8.27)	61 (2.40)	63 (2.48)	40 (1.57)	30 (1.18)
1" (DN25)	65 (2.56)	95 (3.74)	92 (3.62)	160 (6.30)	230 (9.06)	61 (2.40)	67 (2.64)	40 (1.57)	30 (1.18)

Weights (approximate) in kg (lbs)

Size	Screwed	Socket weld	ASME 150	ASME 300	ASME 600	PN40	PN100
1/2" (DN15)	1.38 (3.04)	1.49 (3.28)	2.46 (5.42)	2.96 (6.53)	3.06 (6.75)	3.06 (6.75)	4.36 (9.61)
3/4" (DN20)	1.64 (3.62)	1.64 (3.62)	3.16 (6.97)	4.06 (8.95)	4.26 (9.39)	3.96 (8.73)	6.26 (13.8)
1" (DN25)	1.90 (4.19)	1.90 (4.19)	4.16 (9.17)	5.16 (11.4)	5.46 (12.0)	4.86 (10.7)	8.16 (18.0)

Capacities

Installation and Maintenance

The TDC46M is designed for installation with the disc in a horizontal plane with the insulating cover at the top.

• It is recommended that a non-return valve is fitted when discharging condensate into return lines where backpressure is experienced (e.g., DCV3).
• It is also recommended that a diffuser is fitted when discharging to atmosphere.
• Consideration should be given to fitting isolation valves upstream and downstream of the steam trap for ease of maintenance.

Spare Parts

The spare parts available are shown in solid outline. Parts drawn in a grey line are not supplied as spares.

Available spares	Item No.
Insulating cover	3
Top cap, seat and disc assembly	2, 4, 5, 6, 7, 8
Strainer screen and gasket	9, 10
Set of gaskets (packet of 3 sets)	8, 10
BDV1 blowdown valve retrofit kit	-

Recommended tightening torques:

Item	Part	Size	Torque (N m)	Torque (lbf ft)
2	Top cap	50 A/F	300	221
11	Strainer cap	24 A/F	105 - 110	81

How to Order

Example: 1 off Spirax Sarco DN15 TDC46M thermodynamic steam trap having flanged EN 1092 PN40 connections.