Needle valve characteristics
■ Non rotating valve stem head design, to avoid the relative rotation of the valve seal between the two side to reduce the wear and tear and reduce the wear and tear seal, effectively improve the service life of the valve;
■ The packing is designed in the way of the valve stem drive thread to realize the isolation of the material and the system of the transmission thread;
■ The extrusion or rolling forming process is used to increase the strength of the thread and the accuracy of the screw pair;
■ Different valve body material and structure form, handle color and form, panel mounting options;
■ Valve reference standard: E B16.34 ASM design, each valve in the factory before the water or nitrogen for the rated working pressure of the shell strength and sealing test;

NV Series ■  Design of one type forged valve body; ■ Body material: 316 stainless steel and brass, other materials Please contact MasterLok company; ■ Path: 2.0 mm ，4.4 mm ，6.4 mm ，9.5 mm ； ■ Maximum working pressure:3000p sig (206 b ar), Can choose to 5000p sig (345 b ar)； ■ Working temperature: -54 °C to 315 °C（-65 °F to 600 °F） ■ The highest temperature with PTFE filler is 232 °C（454 °F） ■ The highest temperature with PEEK filler is 315 °C（600 °F）	■  Sealing surface material: with the valve body and valve tip material ■ Under the tip of the valve type: one type or split type, Integrated: adjustable type, V type, Split type: adjustable type, V type, soft seat, ■ Heat treatment of valve tip; ■ Interface type and dimensions: 1/8”to 3/4 ”(3mm to 20 mm )Double card sleeve 　 1/8 ”to 3/4 ”Thread ■ Two flow options: Straight through type and 90° degree angle ■ Provide panel mounting
NVM、NVH series ■  Cold drawn square bar or integrated forging body design; ■ Body material: 316 stainless steel, other materials, please contact MasterLok company; ■ Maximum working pressure: NVM up to 6000 psig (413bar); 　 NVH to 10,000 psig (689 bar)； ■ Path:4mm、6.4mm、11.1 mm 、15mm 、18mm ； ■ Working temperature:Using PTFE filler, Temperature range from – 53 °C to 232 ° C( – 65°F to 450 °F) ； ■ When using PEEK filler, the temperature can reach to 315 ° C(600 ° F) ■ When using graphite filler, the temperature can be 648 ° C(1200 ° F) ■ Interface type and dimensions: 1/8”to 1”(3mm to25mm)Double card sleeve 1/8”to 1”Thread ■ Three kinds of valve stem selection: ball type, adjustable type, soft valve tip (only for NVM Series) ■ Two flow options: Straight through type and 90° degree angle ■ Provide panel mounting