ROSS Pneumatrol provides engineered pneumatic solutions for use within hazardous and non-hazardous environments.
About Namur Mounted Valves
ROSS Pneumatrol understands the importance of adhering to the strictest approvals to provide products that meet the highest quality and safety aspects.
For our products to be used on an international level we comply with standards that govern our manufacturing principles and processes. ROSS Pneumatrol is accredited to ISO9001 as part of our quality management system. Our quality team strives to ensure each of our processes is monitored and records are kept for continual process and product enhancement.
Many regions we are present in require different locally approved products to maintain safety standards of work environments. This means that our products meet and exceed more than one approval. We have the following approvals on many of our products; ATEX certification, IECEx certification, CCCEx certification, FM certification, and SIL certification.
Descriptions of ROSS Pneumatrol 1/4″, BSP/NPT, Namur Mount, 3/2 or 5/2, Direct Air Pilot, Single or Dual Solenoid

- Pilot valve designed for direct mounting onto 1/4 turn pneumatically operated valve actuators meeting ‘NAMUR’ standard fixing dimensions.
- Body material is available in Aluminium (standard), Stainless Steel, and Brass.
- Seal kit available – VSKC15P
- Compatible with all safe area solenoids
Features of 1/4″, BSP/NPT, Namur Mount, 3/2 or 5/2, Direct Air Pilot, Single or Dual Solenoid
- Top-face air connection
- 1/4? BSP mains air connection and 1/8? BSP exhaust ports, also available in NPT ports
- Integrated Exhaust to Spring (ETS) feature in 3/2 position
- Single pilot spring return function or double pilot stay put function
- Built-in 3/2 to 5/2 function conversion facility for spring return and double-acting actuators respectively
Conversion Facilities of 1/4″, BSP/NPT, Namur Mount, 3/2 or 5/2, Direct Air Pilot, Single or Dual Solenoid
- The valve is fitted with a change-over plate that allows the valve to be converted from 3/2 to 5/2 function quickly and easily.
- In 3/2 function a proportion of clean air exhausting from the actuator is fed back into the spring chamber.
Material Specifications of 1/4″, BSP/NPT, Namur Mount, 3/2 or 5/2, Direct Air Pilot, Single or Dual Solenoid
STANDARD | |
Body and End Caps | Black Anodised Aluminium (Dural) |
Spool | Hard Anodised Aluminium PTFE Impregnated |
Spacers | Glass Filled Acetal |
Seals | Nitrile |
Spring | Music Wire |
Mounting Screws | Stainless Steel |
Change Over Plate | Nylon 66 30% Glass Filled |
Gasket | Nitrile |
Valve Specifications of 1/4″, BSP/NPT, Namur Mount, 3/2 or 5/2, Direct Air Pilot, Single or Dual Solenoid
Standard | |
Port Connection Size | ¼” BSP |
Pilot Port Connection Size | 1/8” BSP |
Working Pressure | 3 to 10 bar |
Pilot Signal Pressure | 3 to 10 bar |
Cv Factor | 0.7 |
Flow Rate (at 6 bar with 1 bar pressure drop) | 675 l/min |
Maximum Ambient Temperature | +80°C |
Minimum Working Temperature | -20°C |
Source: https://www.pneumatrol.com
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