Full definition
Precision regulating valve with a very fine tapered stem (needle) controlling very small flow rates at high resolution. Linear flow-to-turn characteristic. Sizes: 1/8" to 1" NPT. Pressure: up to 700 bar (stainless). Materials: brass (up to 150°C), 316 stainless (aggressive fluids), Hastelloy (chemical service). Applications: oil dosing, instrumentation circuits, cylinder speed control (with integrated check valve). Standard ASTM A276. Brands: Swagelok, Parker (N series), Hoke, NOSHOK, Omega.