SPIRAX SARCO · STEAM TRAPS
Spirax Sarco TD42 Thermodynamic Steam Trap – Stainless Steel, PN63
Spirax Sarco TD42 thermodynamic steam trap for industrial steam systems. Stainless steel, up to 42 bar g. Enquire at PC Engineering India.
Overview
The Spirax Sarco TD42 is a maintainable thermodynamic steam trap constructed entirely from stainless steel, designed for reliable condensate discharge in industrial steam systems. Its robust construction and simple operating principle make it suitable for a wide range of process and utility steam applications.
The TD42LC variant is engineered specifically for lower condensate loads, making it ideal for steam mains drainage where condensate volumes are relatively small. Both versions operate on the thermodynamic disc principle, responding to the difference in velocity between steam and condensate to provide efficient, automatic condensate removal.
This steam trap complies with the European Pressure Equipment Directive 97/23/EC and is available with a manufacturer's Typical Test Report for applications requiring documented certification.
Key Features
- All stainless steel construction – body, cap, disc, and strainer components for corrosion resistance and durability
- Maintainable design – field-serviceable with readily available spare parts
- High pressure rating – suitable for operating pressures up to 42 bar g
- Compact footprint – lightweight design for easy installation in constrained spaces
- Optional insulating cover – protects against heat loss in outdoor or exposed installations
- Integral blowdown valve option – BDV1 or BDV2 can be fitted to the strainer cap
- Low capacity variant (LC) – optimised for mains drainage applications
Specifications
| Parameter | Value |
|---|---|
| Body Design Conditions | PN63 |
| Maximum Allowable Pressure (PMA) | 63 bar g @ 100°C |
| Maximum Operating Pressure (PMO) | 42 bar g (recommended) |
| Maximum Allowable Temperature (TMA) | 400°C @ 42 bar g |
| Minimum Operating Temperature | 0°C |
| Maximum Backpressure (PMOB) | 80% of inlet pressure |
| Minimum Differential Pressure | 0.25 bar g |
| Cold Hydraulic Test Pressure | 95 bar g |
| Sizes Available | ⅜", ½" LC, ½", ¾" |
| Pipe Connections | Screwed BSP or NPT |
| Body Material | Stainless Steel ASTM A743 Gr. CA 40 |
| Cap Material | Stainless Steel AISI 416 |
| Disc Material | Stainless Steel BS 1449 420 S45 |
| Strainer Screen | Stainless Steel BS 1449 304 S16 |
| Weight Range | 0.75 kg (⅜") to 1.00 kg (¾") |
Applications
The Spirax Sarco TD42 thermodynamic steam trap is widely used across industries requiring efficient condensate removal from steam systems:
- Steam mains drainage – particularly the TD42LC for low condensate loads - Process heating equipment – heat exchangers, jacketed vessels, dryers - Tracing lines – steam tracing for pipelines and instrumentation - HVAC systems – steam-based heating in commercial and industrial buildings - Power generation – auxiliary steam systems and condensate recovery - Refineries and petrochemical plants – utility and process steam networks - Pharmaceutical and food processing – where stainless steel construction is essential
Frequently Asked Questions
Get a Quote
Contact PC Engineering for pricing, availability, and technical support for the Spirax Sarco TD42 Thermodynamic Steam Trap. Call us or fill in our inquiry form — our engineers will respond within 24 hours.
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