Brand: Spirax Sarco

Spirax Sarco TD42 Thermodynamic Steam Trap PN63

Name: Spirax Sarco TD42 Thermodynamic Steam Trap – Datasheet & Quote
Brand: Spirax Sarco
SKU: TD42

Description

A maintainable thermodynamic trap for steam mains drainage

The Spirax Sarco TD42 is a maintainable thermodynamic steam trap in stainless steel with an integral strainer, offered in 3/8 inch and 1/2 inch low-capacity versions (TD42LC) and in 1/2 and 3/4 inch standard versions. Spirax Sarco states that the TD42LC is specifically designed for relatively small condensate loads, which makes it a typical choice for draining steam mains. It has one moving part, a hardened stainless steel disc, and the body is rated PN63 with a recommended operating pressure of up to 42 bar g.

Technical specifications

Parameter	Specification
Model	TD42 (1/2 inch and 3/4 inch) and TD42LC low capacity (3/8 inch and 1/2 inch)
Connections	Screwed BSP parallel Rp (ISO 7-1) or NPT
Body design	PN63; PMA 63 bar g at 100 °C
TMA / TMO	400 °C at 42 bar g; minimum allowable temperature 0 °C
PMO	42 bar g recommended for optimum performance
Max. backpressure	80 percent of inlet pressure; otherwise the trap may not shut off
Min. operating differential pressure	0.25 bar g
Vacuum	Safe for use under full vacuum conditions
Cold hydraulic test pressure	95 bar g
Body	Stainless steel ASTM A743 Gr. CA 40
Cap and strainer cap	Stainless steel AISI 416
Disc	Stainless steel BS 1449 420 S45
Strainer screen	Stainless steel ASTM A240 316L
Insulating cover (option)	Aluminium
Weights	0.75 kg (3/8 inch and 1/2 inch LC), 0.80 kg (1/2 inch), 1.00 kg (3/4 inch)
Standards and certification	Complies with the European Pressure Equipment Directive 2014/68/EU; manufacturer Typical Test Report available if requested at order

Options, installation and ordering

Two optional extras are listed: an insulating cover, which keeps the trap from being unduly influenced by heat loss in cold, windy or wet locations, and an integral blowdown valve (BDV1 or BDV2) fitted to the strainer cap, which may alternatively be drilled, tapped and plugged 3/8 inch. The TD42 should be installed with the capsule horizontal and the cover on top. Spirax Sarco recommends a non-return valve where condensate is discharged into return lines with backpressure, a diffuser when discharging to atmosphere, and isolation valves upstream and downstream for maintenance. To order, state size, model and connection standard, for example one 1/2 inch TD42 with screwed BSP Rp connections. Spares are available for the disc (pack of three), strainer screen and gasket, insulating cover and strainer cap gasket.

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About brand

Steam is the specialty of Spirax Sarco: how to generate it cleanly, distribute it, control it and get the condensate back. The company dates from 1888 and is based in Cheltenham, United Kingdom. Seven Star LLC lists Spirax Sarco clean steam equipment, bellows sealed stop valves, steam traps and steam flowmeters, and sources them for process plants, hospitals and food factories in Oman.

Spirax Sarco products listed here

The listing includes these main groups, along with further steam traps, pressure reducing valves and filters:

Clean steam and hygienic equipment: the CSG-HS clean steam generator, STERI-TROL clean service control valve, SRV66 sanitary pressure reducing valve, SVL488 clean service safety valve and the BT6-B balanced pressure thermostatic steam trap
Isolation valves: BSA and BSAT bellows sealed stop valves, the BSA3HP high pressure version, A3S and A3SS valves and the DBB3 double block and bleed valve
Steam metering: ILVA variable area flowmeter and the TVA and TFA target flowmeters

The STS17.2 steam-trapping station is a compact assembly for drain points.

Where Spirax Sarco steam equipment is used

Plant steam systems in refineries, chemical plants, laundries and food production use Spirax Sarco steam traps, stop valves and flowmeters for distribution and energy accounting. Clean steam products serve sterilizers, bioreactors, pharmaceutical water systems and food contact processes, where stainless steel wetted parts and documented surface finish are required. Requests from the GCC are often for a like-for-like trap or valve on an existing line.

Ordering Spirax Sarco parts: what we need

Give the product type (for example BSA3T or BT6-B), nominal size, end connection and its standard (flanged PN or ASME class, screwed, butt weld or sanitary clamp), body material and the operating pressure and temperature. For steam traps add the condensate load and differential pressure. For Spirax Sarco flowmeters send line size, steam pressure and the flow range, plus the display or flow computer required. On clean steam items, state the surface finish and the material certificates you need. A nameplate photo helps where the type is not known.

Browse Spirax Sarco products by category: Clean Steam, Globe Valve, Flowmeters.