
Offered in four different body materials, this group of valves can handle a wide range of general purpose liquid and gasapplications. Six types of stem tips are available, including two styles of vee-points.
Design Features:
- Integral bonnet provides differential thread pitch between stem threads and packing nut thread preventing accidental stem removal
- A choice of PCTFE, metal, vee-point, blunt veepoint, or regulating stem tips
- Dyna-Pak® packing provides a leak-tight seal with low operating torque in deep vacuum or high pressure applications
- All valves are tested for bubble-tight leakage at both seat and packing
- Broad selection of male NPT, female NPT, and GYROLOK® fractional or metric tube fitting connections
- Color-coded handles are available for identifying system fluids
- All models can be ordered for panel mounting
- All models can be panel mounted without packing disruption. Packing can be adjusted without removal from panel
- Special High Tolerance NPT Thread
Typical Applications:
- Instrument air lines
- Sampling
- Gas chromatography
- Test stands
- Cylinder valves
For a general overview of the Hoke product portfolio, please click here to download the Hoke Overview Brochure.
For a condensed version of the full product catalogue, please click here to download the Hoke Condensed Catalogue.
For the full range of needle valves, please click here to download the Hoke Needle Valves Catalogue.
Request a Quote
Why choose Boiswood?
For your HOKE 3700, 3800 & 3900 UNION BONNET NEEDLE VALVE

Quality Products & Service Levels
World-class quality products backed by unrivalled service levels. We only partner with the best manufacturers in industry. You can trust in our 35+ years of experience.

Competitive Pricing Structures
Competitively priced products that we strive to keep consistent. We always ensure special pricing structures are considered.

Excellent Delivery Schedules
Attractive lead times that are monitored and managed, ensuring customers receive on-time deliveries. We can also ship our products internationally.

Ultra-Fast Response Times
Tired of chasing for answers? We pride ourselves on our unmatched response times. You can rely on us to provide extremely quick answers to technical and commercial queries.

Free Technical Support
On-going support for our customers to meet any evolving technical requirements. We can help size and specify solutions for even the most bespoke applications.

OEM & Custom Configurations
We sit alongside design teams to specify the right solution for your application, no matter how demanding. Whether it’s out-of-the-box or a custom design, we are up for the challenge.

Tailored Stocking Profiles
Need your products tomorrow? We’ve got you covered with our ever-growing stock profile and product portfolio. We can hold stock for you based on your consumption rates.

Servicing & Assembly Capabilities
Official and manufacturer certified in-house servicing, testing and assembly for our core products, including custom panels and subassemblies.
Read our latest updates
Product & industry news
Meeting you where you want to be met
Get to know us and let us help you



