SPIRAX SARCO · CONTROL VALVES
Spirax Sarco TW Three-Port Self-Acting Control Valve for Liquid Systems
Spirax Sarco TW 3-port self-acting control valve for mixing/diverting liquid systems. Bronze & cast iron. Available at PC Engineering India.
Overview
The Spirax Sarco TW is a three-port self-acting control valve designed specifically for liquid systems, including sea water applications. This valve enables both mixing and diverting functions without the need for external power sources, making it ideal for self-contained temperature control loops in industrial processes.
The TW valve operates in conjunction with Spirax Sarco SA control systems to form a complete self-acting temperature control unit. Its robust construction in bronze or cast iron variants ensures reliable performance across a wide range of industrial liquid handling applications where precise temperature regulation is critical.
Available in screwed and flanged configurations, the TW valve suits various piping standards and installation requirements commonly found in Indian manufacturing facilities. The valve's design accommodates both BSP and NPT thread standards, offering flexibility for different plant specifications.
Key Features
- Three-port configuration for mixing or diverting liquid flow
- Self-acting operation — no external power required
- Compatible with sea water and various industrial liquids
- Available in bronze (PN25) and cast iron (PN16) body materials
- Screwed connections (BSP or NPT) and flanged options
- FEP/PFA piston sealing rings for chemical resistance
- Stainless steel return spring for durability
- Low leakage rate of 1% of full Kv
Specifications
| Parameter | Bronze Valves | Cast Iron Valves | ||||
|---|---|---|---|---|---|---|
| Sizes Available | ¾", 1", 1½" (screwed); DN50 (flanged) | DN50, DN80, DN100 (flanged) | ||||
| Pressure Rating | PN25 | PN16 | ||||
| Max Design Pressure | 25 bar g @ 120°C | 16 bar g @ 120°C | ||||
| Max Operating Temperature | 200°C @ 21.0 bar g | 200°C @ 13.5 bar g | ||||
| Min Operating Temperature | -20°C | -10°C | ||||
| Min Design Temperature | -90°C | -10°C | ||||
| Max Differential Pressure | 3.4 bar (¾" - 1½") | 2.7 bar (DN50 - DN100) | ||||
| Cold Hydraulic Test Pressure | 37.5 bar g | 24 bar g | ||||
| Flange Standard | EN 1092 PN25 | EN 1092 PN16 | ||||
| Body Material | Bronze CC491 KM | EN GJL 250 Cast Iron | ||||
| Size | ¾" | 1" | 1½" | DN50 | DN80 | DN100 |
| Kv | 4.64 | 8.96 | 20.29 | 41.20 | 97.85 | 118.45 |
| Stroke (mm) | 2.7 | 4.3 | 5.9 | 7.7 | 12.4 | 13.9 |
| Size | A (mm) | B (mm) | C (mm) | Weight (kg) | ||
| ¾" (screwed) | 97 | 54 | 58 | 1.2 | ||
| 1" (screwed) | 114 | 57 | 61 | 1.9 | ||
| 1½" (screwed) | 151 | 70 | 76 | 3.8 | ||
| DN50 (bronze flanged) | 201 | 144 | 133 | 15.0 | ||
| DN50 (cast iron flanged) | 219 | 153 | 133 | 13.7 | ||
| DN80 (cast iron flanged) | 250 | 176 | 135 | 25.0 | ||
| DN100 (cast iron flanged) | 351 | 151 | 140 | 32.0 |
Applications
The Spirax Sarco TW valve is suited for temperature control in liquid systems across multiple industries:
- HVAC Systems — Heating and cooling water circuits in commercial and industrial buildings - Process Industries — Temperature regulation in chemical, pharmaceutical, and food processing plants - Marine Applications — Sea water cooling systems on ships and offshore platforms - Power Plants — Cooling water and auxiliary liquid systems - Textile Mills — Dyeing and finishing process temperature control - Sugar & Distilleries — Process liquid temperature management
Frequently Asked Questions
Get a Quote
Contact PC Engineering for pricing, availability, and technical support for the Spirax Sarco TW Three-Port Self-Acting Control Valve. Call us or fill in our inquiry form — our engineers will respond within 24 hours.
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