SPIRAX SARCO · CONTROL VALVES
Spirax Sarco 5112A/B 2/2 Way Pneumatic Control Valve with Multi-Spring Diaphragm Actuator
Spirax Sarco 5112A/B pneumatic control valve with multi-spring diaphragm actuator for industrial process control. Available at PC Engineering India.
Overview
The Spirax Sarco 5112A/B is a 2/2 way pneumatic control valve designed for precise modulating control in industrial process applications. It features a multi-spring diaphragm actuator that provides reliable, consistent actuation across varying operating conditions.
This control valve series is available in two seating configurations: the 5112A with metal-seated trim for high-temperature or abrasive service, and the 5112B with soft-seated (PTFE) trim for tight shut-off applications. The investment cast body construction ensures dimensional accuracy and pressure integrity across the full size range.
Suitable for steam, water, oil, and general process fluids, the 5112A/B valve is widely deployed in manufacturing plants requiring automated flow control with pneumatic instrumentation systems.
Key Features
- 2/2 way globe-style pneumatic control valve
- Multi-spring diaphragm actuator for stable positioning
- Available in metal-seated (5112A) or soft-seated (5112B) configurations
- Investment cast body in WCB, CF8, or CF8M materials
- Graphited PTFE gland packing for reliable sealing
- Wide range of sizes from DN15 to DN150 (½" to 6")
- Kv values ranging from 0.1 to 400 for diverse flow requirements
- Flanged connections for easy installation
Specifications
| Parameter | Value | ||
|---|---|---|---|
| Valve Type | 2/2 Way Globe Control Valve | ||
| Actuation | Multi-Spring Pneumatic Diaphragm | ||
| Size Range | DN15 to DN150 (½" to 6") | ||
| Port Sizes | 5 mm to 80 mm | ||
| Kv Range | 0.1 to 400 | ||
| Actuator Sizes | 250, 400, 800 | ||
| Body Material | ASTM A351 CF8/CF8M (SS304/SS316), ASTM A216 Gr. WCB (Carbon Steel) | ||
| Trim Material | AISI 420 / AISI 316 | ||
| Seat Options | Metal (5112A), PTFE Soft Seat (5112B) | ||
| Gasket | Cr-Ni Foil coated with Graphite | ||
| Gland Packing | Graphited PTFE | ||
| Body Construction | Investment Casting | ||
| Catalogue Number | Size (Inch) | Actuator | Weight (Approx. Kg) |
| 5112A/B155 | ½" | 250 | 15.5 |
| 5112A/B205 | ¾" | 250 | 16.5 |
| 5112A/B255 | 1" | 250 | — |
| 5112A/B405 | 1½" | 250 / 400 | 18.0 / 25.0 |
| 5112A/B505 | 2" | 400 | 30.0 |
| 5112A/B655 | 2½" | 400 | 38.0 |
| 5112A/B805 | 3" | 800 | 80.0 |
| 5112A/B1005 | 4" | 800 | 90.0 |
| 5112A/B1505 | 6" | 800 | 117.0 |
Applications
- Steam pressure and flow control in process heating systems - Temperature control in heat exchangers and jacketed vessels - Flow regulation in chemical and pharmaceutical plants - Boiler feedwater and condensate systems - HVAC and district heating installations - Food and beverage processing lines - Pulp and paper manufacturing - Textile dyeing and finishing operations
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