Description

The STS17.2 compact pipeline connector steam trapping station has been designed to provide a convenient ready to install trapping solution, which includes: upstream and downstream isolation valves, body incorporating quickfit connector, strainer and check valve blanking plug.

Available types

The STS17.2 is available in Single, Double or Double Block and Bleed variations:

• Single Isolation (SB)
• Double Isolation Upstream (DB US)
• Double Block and Bleed Upstream Horizontal (DBB USH)
• Double Block and Bleed Upstream Horizontal Downstream Horizontal (DBB USH DSH)
• Double Block and Bleed Upstream Vertical (DBB USV)
• Double Block and Bleed Upstream Vertical Downstream Horizontal (DBB USV DSH)

The DBB (Double Block and Bleed) variation provides enhanced safety and possibility to drain the steam trapped between the isolation valves by adding a T shaped connection.

The STS17.2 trapping solution incorporates Spirax Sarco quickfit technology, which allows speedy trap maintenance. The following swivel connector steam traps (sold separately) can be used with this pipeline connector enabling it to be tailored to suit any application:

• UTD26 and UTD52 thermodynamic steam traps.
• UBP32 balanced pressure steam trap.
• USM bimetallic steam trap.
• UFT32 ball float steam trap.
• UIB30 and UIB30H inverted bucket steam traps.

Standards and Certification

These products fully comply with the requirements of the European Pressure Equipment Directive 2014/68/EU. These products are available with certification to EN 10204 3.1. Note: All certification/inspection requirements must be stated at the time of order placement.

Materials

No.	Part	Material	Standard
1	Body	Stainless steel	ASTM A351 Gr.CF8
2	Isolation ball valves	Stainless steel	ASTM A182 F316L
3	Handle	Stainless steel	AISI 316
16	Check valve blanking plug	Stainless steel	ASTM A276 431
19	Strainer cap	Stainless steel	ASTM A582 416

Pressure/temperature limits

The product must not be used in this region.

A - B Screwed, socket weld, butt weld and flanged ANSI 300. A - C Flanged EN 1092 PN40. A - D Flanged ASME Class 150.

Parameter	Value
Body design conditions	PN40
PMA Maximum allowable pressure	40 bar g @ 120°C (580 psig @ 248°F)
TMA Maximum allowable temperature	230°C @ 10 bar g (446°F @ 145 psig)
Minimum allowable temperature	-10°C (14°F)
PMO Maximum operating pressure (ASME 150)	11.3 bar g (164 psig)
PMO Maximum operating pressure (All other connections)	17.5 bar g (254 psig)
TMO Maximum operating temperature	230°C @ 10 bar g (446°F @ 145 psig)
Minimum operating temperature	-10°C (14°F)
Designed for a maximum cold hydraulic test pressure of	60 bar g

Dimensions/weights (approximate) in mm and kg

Note: Dimensions shown are for the Single Isolation (SB) version. Please refer to the Technical Information sheet for comprehensive dimensions covering all Double and DBB variations.

Isolation	Size and connection	A	B	C	D	Weight (kg)
Single	1/2" BSP/NPT/SW	222	76	93	90	3.60
Single	3/4" BSP/NPT	222	76	93	90	3.53
Single	3/4" SW	213	76	93	90	3.54
Single	1" BSP/NPT	229	76	93	90	3.71
Single	1" SW	269	76	93	90	3.86
Single	1/2" ASME 150	268	76	93	90	4.45
Single	1/2" ASME 300	294	76	93	90	4.98
Single	DN15 EN 1092 PN40	284	76	93	90	5.12
Single	3/4" ASME 150	272	76	93	90	4.67
Single	3/4" ASME 300	306	76	93	90	5.98
Single	DN20 EN 1092 PN40	304	76	93	90	5.74
Single	1" ASME 150	271	76	93	90	4.96
Single	1" ASME 300	309	76	93	90	6.64
Single	DN25 EN 1092 PN40	304	76	93	90	6.24

Isolation	Size and connection	A	B	C	D	Weight (kg)
Double	1/2" BSP/NPT/SW	350	76	93	90	5.32
Double	3/4" BSP/NPT	350	76	93	90	5.25
Double	3/4" SW	341	76	93	90	5.26
Double	1" BSP/NPT	357	76	93	90	5.43
Double	1" SW	397	76	93	90	5.58
Double	1/2" ASME 150	396	76	93	90	6.17
Double	1/2" ASME 300	422	76	93	90	6.70
Double	DN15 EN 1092 PN40	412	76	93	90	6.84
Double	3/4" ASME 150	400	76	93	90	6.39
Double	3/4" ASME 300	434	76	93	90	7.70
Double	DN20 EN 1092 PN40	432	76	93	90	7.46
Double	1" ASME 150	399	76	93	90	6.68
Double	1" ASME 300	437	76	93	90	8.36
Double	DN25 EN 1092 PN40	432	76	93	90	7.97

Optional extras

Integral sensor type SSL1 (steam only) or WLSL1 (for waterlogging) for use with R1C or WLSL1 with DIODE for use with RI6C are available as optional extras, to enable operational monitoring of the steam trap. Please note that the optional Spiratec SSL1 and WLSL1 sensors must not be fitted when the STS17.2 is installed in a vertical application.

BDV1 blowdown valve is also available for cleaning the strainer during operation. Care should be taken when using the BDV1 blowdown valve as the discharge may be hot. Please note that a BDV1 cannot be used when a Spiratec sensor has been chosen to be part of the unit.

Spare parts

The spare parts are available as indicated below. No other parts are supplied as spares.

Available spares	Item
Isolation ball valve seat and stem seals	8, 9
Strainer screen and gasket	21, 22
Spare sensor and sensor gasket (SSL1)	23
Spare sensor and sensor gasket (WLSL1)	24
Spiratec retrofit kit	20, 21 + 23 or 24
Check valve assembly	17, 18
Double isolation conversion kit	X
BDV1 blowdown valve retrofit kit	20, 21 + 25

How to order spares

Always order spares using the description given in the column headed 'Available spares' and state the size and model number. Example: 1 off Spare Spiratec sensor and sensor gasket with WLSL1 diode waterlogging sensor for a 1/2" STS17.2 compact pipeline connector steam trapping station.

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions (IM-P128-23) supplied with the product.

How to order

Example: 1 off Spirax Sarco 1/2" screwed BSP T Rp (ISO 7-1) STS17.2 stainless steel pipeline compact connector steam trapping station, having a Spiratec SSL1 sensor.