SS304 NPT 1/4" Pn16 Worm Gear Operated Female Thread Needle Globe Valve for Water/Steam/Gas

• Customization: Available
• MOQ: 1 Piece
• Application: General
• Model NO.: NV-2504
• Connection: NPT Thread
• Body Material: Stainless Steel
• Transport Package: Wooden Case
• Specification: 100*100*100
• Trademark: Yoonad
• Origin: China
• Production Capacity: 50000PCS/Year
• Package Size: 100.00cm * 100.00cm * 100.00cm
• Package Gross Weight: 2.000kg

Product Description

Product Description

Our high-performance needle valve is engineered to deliver exceptional precision in fluid and gas flow regulation, making it an indispensable component for critical industrial systems. Designed with a sharp, tapered needle and a matching seat, this valve enables fine-tuned throttling and shut-off capabilities, ensuring optimal control over low to medium flow rates in demanding environments.

Product ASdvantages

Precision Flow Regulation: The tapered needle design provides micro-adjustable flow control, ideal for applications requiring accurate pressure and flow management (e.g., instrumentation, laboratory equipment, hydraulic systems).

Durable Construction: Crafted from premium materials including 316 stainless steel, brass, and carbon steel, our needle valves offer superior corrosion resistance, high-temperature tolerance, and long-term reliability. Optional PTFE or graphite packing ensures leak-proof sealing even under extreme conditions.

Versatile End Connections: Available in a range of connection types (NPT, BSPP, BSPT, flange, weld) to fit diverse piping systems, with sizes from 1/8" to 2" (DN6 to DN50) to meet various installation requirements.

High Pressure Rating: Rated for working pressures up to Class 2500 (PN420) and temperatures ranging from -20°C to 450°C (-4°F to 842°F), suitable for harsh industrial media such as oil, gas, water, steam, and corrosive chemicals.

Easy Operation: Equipped with a ergonomic handwheel (or optional actuator for automated control) for smooth, precise adjustments, and a non-rising stem design for space-saving installation.

How does valve work?

A needle valve operates on a precision throttling principle, designed to regulate fluid or gas flow with exceptional control—especially for low to medium flow rates in critical applications. Here's a detailed breakdown of its working mechanism:

Core Component Interaction
At the heart of the valve lies a tapered, needle-like stem (typically made of hardened steel or stainless steel) that mates with a corresponding seat (often constructed from soft materials like PTFE, graphite, or metal for tight sealing). The stem is threaded into the valve body and connected to a handwheel (or actuator for automated operation).

Flow Regulation Process
Opening the Valve: When the handwheel is rotated counterclockwise, the threaded stem retracts upward, pulling the tapered needle away from the seat. This creates a narrow annular gap between the needle and the seat, allowing fluid/gas to pass through. The needle's gradual taper ensures the gap widens incrementally with each turn of the handwheel, enabling micro-adjustable flow control.

Closing the Valve: Rotating the handwheel clockwise advances the stem downward, driving the needle into the seat. The precision fit between the tapered needle and the seat eliminates the gap entirely, achieving a tight, leak-proof shut-off.

Throttling Precision: Unlike globe valves or gate valves, the needle valve's narrow flow path and fine-threaded stem allow for minute adjustments to the gap size. This makes it ideal for applications where precise flow rate control (e.g., maintaining stable pressure in instrumentation lines) or metering of fluids is required.

Product Parameters

1. Size Specifications
Nominal Diameter (DN): DN6, DN10, DN15, DN20, DN25, DN32, DN40, DN50 (corresponding to 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2" NPT/BSP)
Port Size: 1/8" to 2" (inch) | 3mm to 50mm (metric)
Body Length: Conforms to ANSI B16.10, DIN 3202, or ISO 5752 standards
Connection End Dimensions: Compliant with NPT (ANSI B1.20.1), BSPP/BSPT (ISO 228), flange (ANSI B16.5, DIN EN 1092)

2. Pressure & Temperature Ratings
Pressure Class: ANSI Class 150, 300, 600, 1500, 2500 | PN10, PN16, PN25, PN40, PN63, PN100, PN160, PN420
Working Pressure: Up to 6000 PSI (413 Bar) for industrial-grade models
Temperature Range: -50°C to 450°C (-58°F to 842°F) (varies by material; PTFE packing up to 260°C/500°F, graphite packing up to 450°C/842°F)
Maximum Allowable Pressure (MAP): Rated at 20°C (68°F) per ASME B16.34

3. Material Specifications
Valve Body: 316/304 Stainless Steel, Brass, Carbon Steel (A105), Monel, Hastelloy, Titanium
Valve Stem/Needle: Hardened Stainless Steel (316SS), Alloy Steel, Tungsten Carbide-coated
Valve Seat: PTFE, Graphite, Metal-to-Metal (Stellite-faced), Ceramic
Packing: PTFE, Graphite, EPDM (for corrosion resistance and sealing)
Bonnet: Same as body material (or optional alloy for high-pressure applications)

4. Connection Types
Threaded: NPT (Male/Female), BSPP (G), BSPT (R), metric threads (M)
Flanged: ANSI B16.5, DIN EN 1092-1, JIS B2220 (Class 150-2500, PN10-PN420)
Welded: Socket Weld (SW), Butt Weld (BW) per ANSI B16.25
Other: Compression fitting, flare fitting (for instrumentation applications)

5. Operational Parameters
Flow Capacity (Cv): 0.01 to 2.5 (varies by size; smaller Cv for precise throttling)
Leakage Class: ANSI/FCI 70-2 Class VI (bubble-tight) for soft seats; Class IV for metal seats
Operation Type: Manual (handwheel with fine-pitch threads), Automated (electric actuator, pneumatic actuator)
Stem Type: Non-rising stem (NRS) or rising stem (RS)
Handwheel Material: Aluminum, Cast Iron, Plastic (ergonomic design for precise adjustment)