Gemels(R) Bi-Directional Flow Control Needle Valve, 3/4 NPT Ports, 21 GPM, 5800 PSI. Gemels(R) SKU: GG2NNT430110000. The Gemels(R) Bi-Directional Flow Control Needle Valve 3/4 NPT is expertly designed to deliver precise flow control and shut-off functionality in both directions. Featuring an adjustable knob, this valve allows for fine-tuning to achieve optimal performance in your hydraulic systems. A set screw secures the handle, providing consistent reliability and stability during operation. Constructed with heavy-duty materials, including a carbon steel body and galvanized finish, this valve is built for long-lasting durability and resistance to corrosion. Key specifications include a 3/4 NPT port size, a cracking pressure of 7.25 PSI, and a maximum flow rating of 21 GPM. With a formidable maximum pressure rating of 5800 PSI, this valve is well-suited for high-pressure applications. It operates effectively across a temperature range of -4 to 212°F, making it versatile for various environments. Its compact design, measuring just 3.19 inches in length, ensures seamless integration into your hydraulic system. Opt for the Gemels(R) Bi-Directional Flow Control Needle Valve for dependable, precise, and durable hydraulic flow control. Features: Needle Valve used to provide flow control and shut-off in either direction. Adjustment knob allows for precise valve setting. Set screw allows handle to be locked in place. Heavy Duty Construction. Galvanized Treatment. Carbon Steel body. Specifications: Port Size: 3/4 NPT. Cracking Pressure: 7.25 PSI. Max Flow Rating: 21 GPM. Max Pressure Rating: 5800 PSI. Temperature Range: -4 to 212°F. Length: 3.19.