Needle valves are precision valves designed for fine control of flow rates in low-pressure applications. With their long, tapered needle-like disc and matching seat, they allow gradual and precise adjustments, making them ideal for instrumentation and sampling systems. Needle valves are widely used in industries such as oil and gas, chemical processing, and laboratories.
The needle valve is represented in P&IDs with a unique symbol that highlights its precision control capabilities:
| Symbol | Name | Description |
|---|---|---|
 | Needle Valve | A valve with a long, tapered needle-like disc for fine flow control. |
Needle valves are used in applications that require precise flow control, including:
| Attribute | Details |
|---|---|
| Valve Type | Needle Valve |
| Design | Straight, Angle, Integral Bonnet |
| Operation | Manual, Pneumatic |
| Standards | ANSI, API, ISO, DIN |
| Industries | Oil & Gas, Chemical Processing, Laboratories |
| Component | Material Options |
|---|---|
| Body | Stainless Steel, Brass, Monel |
| Needle | Stainless Steel, Alloy Steel |
| Seat | PTFE, Metal |
| Stem | Stainless Steel |
| Attribute | Options |
|---|---|
| Size Range | 1/8 inch to 2 inches |
| Pressure Rating | Up to 6,000 PSI |
| Temperature Range | -40°F to 450°F (-40°C to 232°C) |
| End Connections | Threaded, Flanged |
| Actuator Type | Details |
|---|---|
| Manual | Handwheel |
| Pneumatic | Compact actuators for fine control |
| Attribute | Details |
|---|---|
| Leakage Class | Class VI (Soft Seat) |
| Flow Coefficient (Cv) | Low Cv for precise flow control |
| Cycle Life | 100,000+ Cycles (Depending on material and application) |
| Accessory | Details |
|---|---|
| Positioner | For pneumatic actuators |
| Limit Switches | Optional for critical systems |
| Locking Mechanism | Prevents accidental adjustments |
| Configuration | Details |
|---|---|
| Manual Operation | 1/4-inch Needle Valve, Stainless Steel Body, Threaded End, Handwheel |
| Pneumatic Actuation | 1/2-inch Needle Valve, Brass Body, Compact Actuator, Flanged End |
| Parameter | Details |
|---|---|
| Warranty | 12-24 Months |
| Certifications | ISO 9001, API 602, CE |
| Testing | Hydrostatic, Air Leakage |
| Attribute | Value |
|---|---|
| Material | Stainless Steel |
| Size | 1/4 inch |
| Pressure Rating | 6,000 PSI |
| Temperature Range | -20°F to 400°F |
| End Connection Type | Threaded |
| Actuator Type | Manual |
Explore vendors for needle valves in your region using Mails AI.
| Parameter | Specification | Estimated Cost |
|---|---|---|
| Material | Brass | $50 - $100 |
| Actuator Type | Pneumatic | $150 - $300 |
| Size (Diameter) | 1/4 inch | $25 - $75 |
For accurate pricing of needle valves, access cost data using Cost AI.
To integrate a 3D model of a needle valve in a Process Plant use Model Builder.
Needle valves are indispensable for precision flow control in various industrial applications. Their compact design and adaptability make them ideal for instrumentation and low-flow systems. Use this guide alongside tools like Micro Data Sheets, Vendor Lists, and Cost AI to make informed decisions and enhance your project outcomes.