Forged Body Needle Valves NF Series/NFH Series
Construction Feature
Needle valve is have major function as needle valve flow control, the Style of this Needle valve One-piece forged body with Integral body/bonnet to reduce leakage point. Compact design with small installation space and low operating torque needed for easy for Maintenance. Wetted stem threads are located below the stem packing and come into contact with system fluid, applicable for high viscosity fluid. Non-rotating stem tip to reduce the friction between tip and seat. Soft stem tip is available (Provided with Knob handle). V-type packing with spring loaded, keep continuous sealing. For NFH Type high pressure have design with Two-stem design with upper stem moving helically, while the lower stem moving linearly to reduce the abrasion of packing. The body and Bonnet is one pieces forged process and without Bonnet, it’s different design with Union Bonnet Needle valve.
Features
- One-piece forged body
- Two-piece stem design
- Upper stem threads cold rolled and lower stem hardened for high strength and smooth operation
- Upper stem thread lubricant isolated from system media
- Linear instead of rotary motion of the rising, non-rotating stem minimizes packing abrasion and reduces the friction between the seat and the tip
- Panel mounting available
- Steady and durable fastening of the handle by double lock-pins
- Handles of different colors available
- Every valve leak tested with Nitrogen or compressed air (NF Series)
at the maximum allowable working pressure or with water (NFH Series)
at 1.1 times the maximum allowable working pressure
Working pressure up to :
NF-Series Stainless steel: 6000 psig (414 bar)
Alloy C-276: 6000 psig (414 bar)
Alloy 400: 5000 psig (345 bar)
Titanium: 3500 psig (241 bar)
Brass: 3000 psig (207 bar)
NFH Series Stainless steel: 10000 psig (690 bar) - Working temperature:
PTFE: -65°F to 450°F (-54°C to 232°C)
PEEK: -65°F to 500°F (-54°C to 260°C)
Graphite: -65°F to 1200°F (-54°C to 649°C)
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Cleaning and Packaging :
FC-01: Standard cleaning and packaging for general industrial procedures.
FC-02: Special cleaning and packaging for wetted system components to ensure compliance with product
cleanliness requirement of ASTM G93 Level C.
When the connection type of valves is FITOK double ferrule tube fitting, the working pressures of the valves are related to the wall thickness of tubing applied. For specific working pressure of the valves.
Testing
Every NF series and NFH series needle valve is factor y tested with nitrogen at 1000 psig (69 bar). Seats have a maximum allowable leak rate of 0.1 std cm3/min. Shell testing is performed to a requirement of no detectable leakage with a liquid leak detector.
Needle Valve 316 SS, NF Series Needle Valve Forged body, 
MWP: 10000 psig working temp: -54°C to 649°C. packing: Graphite, Connection: 3/8 Female NPT, 0.236 ” Orifice T-bar Aluminum Handle
316SS, MWP: 6000psig, working temp:-54 to 649deg C, packing: Graphite, Connection: 10mm tube butt weld. Orifice: 4mm stainless steel bar
316 SS, NF Series Needle Valve, Forged Body, 3/4 Pipe Pipe Butt Weld, Graphite Packing, 6000psig(414bar), -65°F to 1200°F(-54°C to 649°C), 0.59″ Orifice
316 SS, NF Series Needle Valve, 3/4″ Tube Fitting, 0.433″ Orifice, 6000 Psig
316 SS, NF Series Needle Valves, Forged Body, 1/2″ Male FR Fitting, PTFE Packing, 6000psig(414bar), -65°F to 450°F(-54°C to 232°C), 0.25″ Orifice
