Home > Product > Needle valve > By Design & Function > Union Bonnet Needle Valve Manufacturer in India
Engineered for Strength. Designed for Serviceability.
At Perfect Engineers, we manufacture robust and leak-tight Union Bonnet Needle Valves, trusted for their field-serviceable design, pressure integrity, and smooth operation in medium to high-pressure flow systems.
With a two-piece body design, these valves offer reliable sealing and allow for easy maintenance, repacking, and stem replacement—ideal for demanding environments like refineries, chemical plants, and gas distribution panels.
A union bonnet needle valve consists of a separate valve body and bonnet held together by a union nut. This construction offers ease of disassembly, allowing the stem and packing to be serviced or replaced without removing the valve from the system.
Ideal for medium-to-high pressure systems, where frequent repacking or tight shut-off performance is critical.
| Parameter | Specification |
|---|---|
| Body Type | Union Bonnet (Serviceable) |
| Pressure Rating | Up to 6000 PSI (Standard) |
| Temperature Rating | 20°C to +425°C |
| Seat Material | PTFE, PEEK, Graphite, Metal-to-Metal |
| Sizes Available | ¼”, ⅜”, ½”, ¾”, 1” |
| End Connections | BSP/NPT, Compression, Flanged, SW/BW |
| Valve Design | Straight, Angle, Block & Bleed |
| Certification | EN 10204 3.1, ISO 9001:2015, CE, IBR |
| Testing | Hydrostatic & Pneumatic (API / BS EN) |
| Feature | Union Bonnet Valve | Integral Bonnet Valve |
| Serviceability | 🟢 Repackable, stem removable | 🔴 Not serviceable (1-piece) |
| Leak-tightness | 🟢 Excellent with packing | 🟢 Excellent (no joint) |
| Construction | 2-piece with union nut | Monolithic (machined) |
| Best Use | Frequent maintenance areas | Zero-leak instrumentation use |
+91-9004860491
www.perfectqrc.com
Our standard range goes up to 6,000 PSI, with custom options up to 10,000 PSI.
Yes. With proper material and seat selection, they can be used in toxic, corrosive, and high-pressure gas systems.
Yes. We offer panel-mountable union bonnet valves with locking nuts and front-face plates.
Every valve is 100% hydro and pneumatic tested, and documentation is provided with the shipment.
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