screw tip assembly

There are two competing aspects: backflow vs. material stagnation when it come to discussing non-return screw tips in general. Screw tips with high backflow are not very well suited for high precision molding or materials with very low viscosity. Adversely, screw tips which cause material stagnation have dead-spots where material can become caught and remain indefinitely. Material stagnation is avoided when processing heat sensitive materials or products which require frequent material or color changes.
Check Ring – Moderate Backflow & Moderate Stagnation – These tips are the most widely used non-return valve because the versatility of applications which can process using check rings.
Smear Tips – High Backflow & Low Stagnation – These screws are ideal for high viscosity, heat sensitive materials such as PVC.
Ball/Poppet Valves – Low Backflow & High Stagnation – These tips are ideal for low viscosity materials which are not heat sensitive such as polyolefins.
One thing you just keep in mind, the conclusions we made above focuses on the general uses of these screw tips. There are a wide array of screw tip designs for each of the general categories above. We have seen some check ring designs which have very little backflow, and some ball valves which have very little stagnation.
Haitian free flow screw tip assemblies:
22mm Haitian screw tip assemblies, 30 Degree Nose Angle, M10X1.5 LH Thread, H13/HT
24mm Haitian screw tip assemblies, 30 Degree Nose Angle, M10X1.5 LH Thread, H13/HT
26mm Haitian screw tip assemblies, 30 Degree Nose Angle, M12X1.75 LH Thread, H13/HT
28mm Haitian screw tip assemblies, 30 Degree Nose Angle, M12X1.75 LH Thread, H13/HT
30mm Haitian screw tip assemblies, 30 Degree Nose Angle, M12X1.75 LH Thread, H13/HT
32mm Haitian screw tip assemblies, 30 Degree Nose Angle, M16X2 LH Thread, H13/HT
34mm Haitian screw tip assemblies, 30 Degree Nose Angle, M16X2 LH Thread, H13/HT
36mm Haitian screw tip assemblies, 30 Degree Nose Angle, M16X2 LH Thread, H13/HT
38mm Haitian screw tip assemblies, 30 Degree Nose Angle, M20X2.5 LH Thread, H13/HT
40mm Haitian screw tip assemblies, 30 Degree Nose Angle, M20X2.5 LH Thread, H13/HT
42mm Haitian screw tip assemblies, 30 Degree Nose Angle, M20X2.5 LH Thread, H13/HT
45mm Haitian screw tip assemblies, 30 Degree Nose Angle, M20X2.5 LH Thread, H13/HT
48mm Haitian screw tip assemblies, 30 Degree Nose Angle, M24X3 LH Thread, H13/HT
50mm Haitian screw tip assemblies, 30 Degree Nose Angle, M24X3 LH Thread, H13/HT
55mm Haitian screw tip assemblies, 30 Degree Nose Angle, M24X3 LH Thread, H13/HT
60mm Haitian screw tip assemblies, 30 Degree Nose Angle, M27X3 LH Thread, H13/HT
60mm Haitian screw tip assemblies, 60 Degree Nose Angle, M27X3 LH Thread, H13/HT
65mm Haitian screw tip assemblies, 60 Degree Nose Angle, M30X3.5 LH Thread, H13/HT
70mm Haitian screw tip assemblies, 60 Degree Nose Angle, M36X4 LH Thread, H13/HT
75mm Haitian screw tip assemblies, 60 Degree Nose Angle, M36X4 LH Thread, H13/HT
80mm Haitian screw tip assemblies, 60 Degree Nose Angle, M39X4 LH Thread, H13/HT
84mm Haitian screw tip assemblies, 60 Degree Nose Angle, M39X4 LH Thread, H13/HT
85mm Haitian screw tip assemblies, 60 Degree Nose Angle, M39X4 LH Thread, H13/HT
90mm Haitian screw tip assemblies, 60 Degree Nose Angle, T48X4 LH Thread, H13/HT
100mm Haitian screw tip assemblies, 60 Degree Nose Angle, T55X4 LH Thread, H13/HT