FAQ

Founded in 1998, FITOK Group is an industry-leading developer and manufacturer of superior high-quality instrumentation valves and fittings.
FITOK Group has R&D centers, manufacturing facilities, warehousing and service locations in Offenbach Germany, Texas USA, Shenzhen and Suzhou China, Dubai UAE and Canada.
FITOK Group is capable of manufacturing 5 different product categories, including: General Instrumentation Valves and Fittings, Medium & High Pressure Valves and Fittings, High Purity & Ultra High Purity Products, Sampling Systems and Tubing.    

 FITOK Tube Fittings up to 1" or 25 mm

1.Loosen the nut 1/4 turn from finger-tight position.

2. Insert tubing into the tube fitting, make sure that the tubing rests firmly on the shoulder of the port.

3. Finger-tighten the nut.

4. Tighten the nut 1 1/4 turns with wrench while holding the body of the fitting or the valve steady .
     For small-sized fittings (1/16", 1/8" and 3/16", 2 mm, 3 mm and 4 mm), tighten the nut 3/4 turn with wrench .

1. NPT Threads (NPT)
   
    60 thread angle
    Pitch measured in inch
    Truncation of root and crest are parallel 
    Taper 1:16
    Type of sealing: thread sealant
    
2.   ISO Tapered Threads (R, R1, R2, RC, RT, PT, BSPT, ZG)
   
     55 thread angle 
     Pitch measured in inch
     Truncation of root and crest are round 
     Taper 1:16 
     Type of sealing: thread sealant
    
3. ISO Parallel Threads (G, RP, PF, BSPP)
   
    55 thread angle 
    Pitch measured in inch
    Truncation of root and crest are round

1. Max. working pressure at max. medium temperature
2. Max. temperature of the flowing medium
3. Valve function, shut-off or control
4. Valve material taking into account the chemical properties of the medium
5. Max. required flow rate through valve
6. Valve connection method, integrated screwing, male or female thread

1.  Mechanical particles - from transport tanks, transport piping and air.
2.  Free water - enters the aviation fuel by release from the bound water contained in all hydrocarbon products due to changes in temperature and pressure and from the surrounding atmosphere when handling fuel. Free water is removed from the fuel by coalescing filters and by regularly draining storage tanks, filters and filling tanks.
3. Biological contamination - bacteria, yeasts that originate at the interface of hydrocarbons and free water in storage tanks and filters. As these particles are smaller than 1µm, they cannot be filtered by conventional filters and there is a risk of contamination of the fuel in the aircraft tanks.