Description

The SMC32 and SMC32Y are carbon steel maintainable bimetallic steam traps with straight connections. The SMC32 has an integral flat strainer screen and the SMC32Y an integral, cylindrical Y-type strainer. All pressure bearing components are produced by TÜV approved suppliers in accordance with AD-Merkblatt WO/TRD100.

Standards and Certification

This product fully complies with the requirements of the European Pressure Equipment Directive 2014/68/EU. It is available with certification to EN 10204 3.1. Note: All certification/inspection requirements must be stated at the time of order placement.

Sizes and pipe connections

• 1/2", 3/4", and 1" screwed BSP T Rp (ISO 7-1) or NPT.
• 1/2", 3/4", and 1" socket weld ends to BS 3799.
• 1/2", 3/4", and 1" butt weld ends to EN 12 627.
• DN15, DN20 and DN25 standard flange to EN 1092 PN40, ASME B 16.5 Class 150 and 300, JIS/KS 10K and JIS/KS 20K.

Pressure/temperature limits (ISO 6552)

The product must not be used in the shaded region. The product should not be used in this region or beyond its operating range as damage to the internals may occur.

• A - B: Screwed, socket weld, butt weld and flanged ASME 300
• A - C: Flanged EN 1092 PN40
• A - D: Flanged JIS/KS 20K
• A - E: Flanged ASME 150
• F - G: Flanged JIS/KS 10K

Parameter	Value
Body design conditions	PN40
PMA Maximum allowable pressure	50 bar g @ 50°C
TMA Maximum allowable temperature	400°C @ 35 bar g
Minimum allowable temperature	-60°C
PMO Maximum operating pressure for saturated steam service	32 bar g
TMO Maximum operating temperature	350°C @ 32 bar g
Minimum operating temperature	0°C
Designed for a maximum cold hydraulic test pressure of	75 bar g

Note: For lower operating temperatures consult Spirax Sarco. Product is safe for use under full vacuum conditions.

Materials

No.	Part	Material	Standard
1	Cover	Carbon steel	DIN 17243 C22.8 (W/S 1.0460) ASTM A105N
2	Bimetallic element	Corrosion resistant bimetal and stainless steel	Rau Type H46
3	Valve seat	Stainless steel	BS 970 431 S29
4	Locking nut	Stainless steel	-
5	Strainer screen	Stainless steel	AISI 304
6	Valve	Stainless steel	-
7	Cover gasket	Stainless steel reinforced exfoliated graphite	-
8	Body/flanges	Carbon steel	DIN 17243 C22.8 (W/S 1.0460) ASTM A105N
9	Cover bolts	Stainless steel (M10 × 30)	A2-70
10	Strainer cap	Carbon steel	DIN 17243 C22.8 (W/S 1.0460) ASTM A105N
11	Strainer cap gasket	Stainless steel	BS 1449 304 S16

Dimensions/weights (approximate) in mm and kg

SMC32

Size	A	A1	B	C	D	E	Weight (Scrd/SW/BW)	Weight (Flanged)
1/2" DN15	95	150	94	92	17	51	1.7	3.1
3/4" DN20	95	150	94	92	19	51	1.7	3.7
1" DN25	95	160	94	92	23	51	1.8	4.4

SMC32Y

Size	A	A1	B	C	E	F	G	Weight (Scrd/SW/BW)	Weight (Flanged)
1/2" DN15	95	150	94	92	51	54	28	1.7	3.1
3/4" DN20	95	150	94	92	51	54	28	1.7	3.7
1" DN25	95	160	94	92	51	54	28	1.8	4.4

Capacities

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions (IM-P076-09) supplied with the product.

Installation note

The SMC32 and SMC32Y are designed for installation in any position, horizontal or vertical. It is recommended that a non-return valve is fitted when discharging condensate into return lines where backpressure is experienced. It is also recommended that a diffuser is fitted when discharging to atmosphere. Increased backpressure will reduce the temperature of condensate discharge. For ease and maintenance, isolation valves should be fitted upstream and downstream of the steam trap.

How to order

Example: 1 off Spirax Sarco 1/2" SMC32 carbon steel bodied maintainable bimetallic steam trap with an integral strainer screen and screwed BSP T Rp (ISO 7-1) connections.

Spare parts

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

Available spares:

• Element set: 2, 3, 4, 6
• Strainer screen (SMC32, 3 off): 5
• Strainer screen and gasket (SMC32Y, 1 off each): 5, 11
• Set of cover gaskets (packet of 3): 7
• Strainer cap gasket (packet of 3): 11

Recommended tightening torques

Item	Part	Size (mm)	Thread	Torque (Nm)
3	Valve seat	24 A/F	-	115-125
9	Cover bolts	16 A/F	M10×30	23-27
10	Strainer cap	27 A/F	-	120-135