Product Overview
The FITOK NBSS-FL4-7-Y-A is a precision-engineered needle valve designed for accurate flow control and reliable isolation in demanding industrial fluid and gas handling systems. Manufactured by FITOK, a globally recognized brand in high-quality instrumentation and process components, this valve features a fine-threaded stem and a tapered needle tip that enables precise, incremental throttling and bubble-tight shutoff. Its robust construction makes it ideal for applications requiring exact metering, pressure regulation, and dependable isolation in hydraulic, pneumatic, and general process circuits. The NBSS-FL4-7-Y-A is a direct-fit, high-integrity solution for critical industrial environments where leak-free performance and long service life are paramount.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Needle Valve (Hydraulic / Process & Pneumatic Valve) |
| Model Designation | NBSS-FL4-7-Y-A |
| Operating Pressure | Standard Industrial Grade (Up to 6000 psig / 413 bar, depending on configuration) |
| Mounting & Connection | Standard FITOK / ISO Interface (1/4 in. tube fitting, panel mount option) |
| Body Material | Stainless Steel 316 (SS316) |
| Stem Type | Fine-threaded, non-rotating needle tip |
| Seal Material | PTFE / PFA (standard) |
| Temperature Range | -20°F to 450°F (-29°C to 232°C) |
| Flow Coefficient (Cv) | 0.7 (nominal) |
Engineering Features & Advantages
- Precision Flow Control: The fine-threaded stem and tapered needle allow for extremely accurate, repeatable throttling and micro-adjustment of flow rates, ensuring optimal process control.
- Leak-Tight Isolation: Engineered with a robust stem seal and precision-machined needle tip to provide bubble-tight shutoff, preventing costly fluid loss and maintaining system integrity.
- Industrial Reliability: Constructed from high-grade 316 stainless steel for excellent corrosion resistance and durability, built for continuous operation under severe industrial conditions.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original FITOK NBSS series and equivalent OEM standards, ensuring drop-in installation without modification.
- Panel Mountable Design: The “Y” configuration and standard mounting interface allow for secure panel mounting, simplifying integration into control panels and instrumentation systems.
Typical Industrial Applications</h3
PRODUCT IMAGES

FITOK NBSS-FL4-7-Y-A Needle Valve
⚡ 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 FITOK NBSS-FL4-7-Y-A Needle Valve. This China-made hydraulic component features a precise flow control design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.