Here’s a list of some of the leading national suppliers of solenoid valves in the United Kingdom:

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Leading Suppliers of Solenoid Valves in the UK

1. Parker Hannifin

   • Website: www.parker.com
   • Notable for: Wide range of solenoid valves and automation solutions.

2. Festo

   • Website: www.festo.com
   • Notable for: Pneumatic and electrical automation technology.

3. Emerson Electric Co.

   • Website: www.emerson.com
   • Notable for: Extensive portfolio in process management and solenoid valves.

4. Bürkert

   • Website: www.burkert.com
   • Notable for: Fluid control and automation solutions.

5. Norgren (part of IDEX Corporation)

   • Website: www.norgren.com
   • Notable for: Pneumatic actuators and valve solutions.

6. SMC Corporation

   • Website: www.smc.eu
   • Notable for: Extensive range of pneumatic equipment including solenoid valves.

7. Aventics (part of Emerson)

   • Website: www.aventics.com
   • Notable for: Innovative valve technology for automation.

8. ASCO (an Emerson brand)

   • Website: www.ascovalve.com
   • Notable for: Leading manufacturer of solenoid valves, especially in fluid automation.

9. Carter Manufacturing Company

   • Website: www.cartermfg.co.uk
   • Notable for: Custom solenoid valves and related components.

10. Simmons Manufacturing Company

    • Website: www.simmonsmfg.com
    • Notable for: Specialty solenoid valves used in various applications. ```

These companies are recognized for their quality products, innovative designs, and contributions to a range of industries requiring solenoid valves. Always check their websites for the most current offerings and technologies.