Home > Product > Needle valve > By Design & Function > Integral Bonnet Needle Valve Manufacturer in India
One-Piece Body. Zero Leakage. Long Life.
At Perfect Engineers, we manufacture high-performance Integral Bonnet Needle Valves designed for leak-free, high-integrity sealing in critical flow control applications. Unlike conventional two-piece valves, these feature a machined single-piece body (integral bonnet) that minimizes the risk of leaks, ensuring reliable and maintenance-free operation in demanding environments.
These valves are widely used in instrumentation systems, chemical injection panels, analyzer loops, and high-pressure gas control applications.
An integral bonnet needle valve is a precision flow control valve with its valve body and bonnet designed as a single solid piece (instead of a bolted joint). This construction enhances leak resistance, mechanical strength, and pressure retention, making it ideal for gas systems, high-pressure fluid circuits, and instrumentation panels.
Preferred in hydrogen, oxygen, and toxic gas lines, where joint integrity is critical.
| Parameter | Specification |
|---|---|
| Body Type | Integral Bonnet (One-piece) |
| Material | SS 316 / 304, CS A105, Monel, Hastelloy |
| Pressure Rating | 3000 – 10,000 PSI |
| Seat Options | PTFE, PEEK, Graphite, Metal-to-Metal |
| End Connections | BSP / NPT, Compression, SW, BW, Flanged |
| Valve Design | Straight, Angle, Bar Stock |
| Handle Options | Round, Knurled, T-bar |
| Testing | Hydrostatic / Pneumatic – API 598 / BS EN |
| Certification | ISO 9001:2015, EN 10204 3.1, IBR, CE |
| End Type | Common Usage |
|---|---|
| BSP/NPT | Industrial and gas panels |
| Compression | Tube fittings in cleanroom and lab systems |
| Flanged | Inline mounting in plants and utility skids |
| Socket/Butt Weld | Permanent high-pressure installations |
+91-8591096714
www.perfectqrc.com
Yes. With metal-to-metal or oxygen-cleaned PTFE seats, they are ideal for oxygen and hydrogen lines.
Yes. ¼” and ½” compression-end models are standard for instrumentation tubing.
Yes. Straight, angle, and block & bleed configurations are available in integral bonnet design.
Common models are available in stock. Custom variants can be shipped in 7–14 working days.
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