Product Overview
The Parker 4V-NLL-V-SS-V is a precision instrumentation needle valve engineered for fine manual flow regulation and reliable isolation in high-purity and corrosive fluid handling systems. Manufactured by Parker Hannifin, a global leader in motion and control technologies, this valve utilizes a non-rotating needle stem design that prevents galling and ensures repeatable, bubble-tight shutoff. The “SS” designation indicates a 316 stainless steel body and trim construction, making it suitable for aggressive media, while the “V” suffix denotes a Viton (FKM) elastomeric seal for enhanced chemical compatibility and elevated temperature service. As a critical component in process instrumentation, analytical, and pneumatic control loops, the 4V-NLL-V-SS-V provides precise metering of gases and liquids in research, OEM, and industrial environments where leak integrity and fine adjustment are paramount.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Instrumentation Needle Valve (Hydraulic / Process & Pneumatic Valve) |
| Model Designation | 4V-NLL-V-SS-V |
| Body & Trim Material | 316 Stainless Steel (SS) |
| Seal Material | Viton (FKM) – “V” suffix |
| Operating Pressure | Up to 5,000 psig (345 bar) at 70°F (21°C) – standard instrumentation rating |
| Operating Temperature | -20°F to 400°F (-29°C to 204°C) with Viton seals |
| Mounting & Connection | Standard Parker instrumentation interface – 1/4″ NPT or equivalent compression port (per model configuration) |
| Flow Control | Non-rotating needle stem, fine-thread manual adjustment |
Engineering Features & Advantages
- Precision Performance: Non-rotating needle tip ensures smooth, repeatable flow metering without seat galling, providing accurate control in analytical and sampling circuits.
- Industrial Reliability: 316 stainless steel body and Viton seals deliver exceptional corrosion resistance and long service life in aggressive chemical and high-purity environments.
- Direct Fit Replacement: Manufactured to Parker’s exact dimensional and functional standards, ensuring drop-in compatibility with existing instrumentation panels and OEM assemblies.
- Leak-Tight Isolation: Engineered for bubble-tight shutoff, meeting stringent process industry leakage requirements for critical gas and liquid service.
Typical Industrial Applications
Parker 4V-NLL-V-SS-V needle valves are widely deployed in analytical instrumentation, chemical injection systems, oil and gas sampling panels, pharmaceutical process skids, and pneumatic control loops. They are also commonly found in research laboratories, semiconductor manufacturing equipment, and hydraulic test stands where precise, low-flow regulation and reliable isolation of corrosive
PRODUCT IMAGES
Parker 4V-NLL-V-SS-V Instrumentation Needle Valve
âš¡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine Parker 4V-NLL-V-SS-V Solenoid Directional Control Valve. This USA-made 24V DC hydraulic component features a 4-way, 3-position design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.