1. Size Range:

Typically available in sizes from 1/8" to 2" (DN 6 to DN 50).

2. Pressure Ratings:

• Pressure ratings vary from 6,000 PSI to 20,000 PSI (414 bar to 1,379 bar) depending on the material and design.

• High-pressure models can handle pressures up to 60,000 PSI.

3. Material Specifications:

• Stainless Steel: SS 304, SS 304L, SS 316, SS 316L

• Carbon Steel: ASTM A105

• Alloy Steel: Inconel, Monel, Hastelloy

• Brass

• Duplex Stainless Steel: F51, F53, F55

• Other Materials: Copper, Nickel, Titanium (for specialized applications)

4. End Connections:

• Threaded: NPT, BSPT, BSPP (1/8" to 2")

• Socket Weld

• Butt Weld

• Compression Fittings

• Flanged Ends: ASME/ANSI, DIN, EN standards (for larger sizes)

5. Temperature Ratings:

• Needle valves can operate within a wide temperature range, typically from -20°C to 450°C, depending on the material and application.

• Special high-temperature versions are available for temperatures up to 650°C.

6. Design and Features:

• Bonnet Design: Integral bonnet or union bonnet designs to suit the pressure requirements.

• Stem Types: Non-rotating stem, rising stem, or rotating stem.

• Packing Options: PTFE, Graphite, or other materials based on temperature and pressure requirements.

• Metal-to-Metal Seating: Ensures high sealing efficiency and durability.

• Soft Sealing: For applications where a bubble-tight seal is required, soft seats made of PTFE or PEEK are used.

• Handle Types: T-handle or round handle, made from materials like plastic, aluminum, or stainless steel.

7. Applications:

• Flow Control: Used for fine adjustment of flow in instrumentation lines, gas or liquid pipelines, and high-pressure applications.

• Isolation: Often used in isolation for sampling, pressure measurement, and calibration lines.

8. Standards & Certifications:

• Manufacturing Standards: ASME B16.34, API 602, ISO 5208.

• Certifications: Fire-safe, API 607, ISO 10497, CRN, and NACE MR0175 compliance for corrosion resistance in harsh environments.

• Testing: Hydrostatic testing, seat leakage testing, and helium leak testing.