China Factory for low flow gear pump - NES Series Melt Gear Pump – Vowa

Melt Gear Pump With Double Shaft Extension And Balance
Optimized tooth shape design, more stable conveying, minimal fluctuation
Runner design without dead ends, no material residue
Double-sided pressure balance structure, suitable for high pressure occasions
Optional wear-resistant configuration, suitable for high filling conditions
Suitable for electric heating
We provide a complete set of solutions for melt pumps, driving devices, control systems and supporting screen changers and die heads
NES series melt gear pump is a melt gear pump for the extrusion system of thermoplastic materials. It is suitable for the extrusion and transportation of thermoplastic high-viscosity polymer melt; it is generally installed between the exit of the extruder and the die and used as a melt metering pump;

The main materials that can be conveyed by the melt gear pump are:
Thermoplastic materials and their blends
PET PBT PTT
PA6 PA66 PA12
PE LDPE LLDPE HDPE HMWPE
PP EVA PB
PB PS HIPS ABS SAN
PC PEK PMMA POM
TPU PLA PBS
Rubber and elastomer materials
NR BR CR NBR
IR IIR
SBR HNBR
EPM EPDM
PU TPU
ACM CSM
ECO SI
The application of extrusion pump in single screw extrusion system

The application of extrusion pump in twin screw extrusion system

The main function of the melt pump:
1. Significantly improve the stability of die pressure and improve product quality;
2. It can realize the nearly linear output of the flow, which is easy to control;
3. Increase the extrusion volume and increase the output;
4. Reduce the load of the extruder, save energy and reduce costs.
The main features of the company’s melt gear pump:
1. Very small pressure and flow pulsation, can achieve linear output of flow, suitable for precision extrusion system;
2. Use different structures and material configurations for different working conditions to better meet the individual needs of users;
3. It can be applied to the working conditions of high temperature (350℃), high pressure (40MPa) and high viscosity (40,000Pa•s);
4. Precise structure, high precision and long life.
The main structure of NES series melt gear pump:
Rotor type: helical or spur gear
Heating method: electric heating/heat medium heating
Sealing structure:
■ Dynamic melt seal + packing seal
■ Mechanical seal
■ Dynamic seal with cooling melt
Material configuration of the main structure of the melt gear pump

The main technical features of NES series melt gear pump:
1. Optimized melt flow channel design: eliminate dead corners in the flow channel, reduce polymer residues to a minimum, and improve the quality of products;
2. Improved gear parameter design: more accurate rotation displacement design makes the output pressure more stable and adapts to precise extrusion conditions;
3. A wide range of applicable viscosity: different sealing methods can be applied to working conditions from low viscosity to very high viscosity;
4. A variety of installation methods: to meet the individual needs of users;
5. High-precision manufacturing and excellent heat treatment: more precise and more durable;
 Technical data:
Viscosity  ： 1～40000Pa•s（1～40,000,000cP）
Suction side pressure ： 0～30MPa
Discharge side pressure ： 0～40MPa
Differential pressure ： 25MPa 
Temperature ： ≤350℃
Heating ： Electric heating
The installation structure of melt gear pump:
It is recommended to use a universal coupling to connect the reducer and the melt pump to eliminate the effects of

thermal deformation; the melt gear pump is a positive displacement forced delivery pump, and the pump output flow can be adjusted by adjusting the pump speed. Frequency conversion is recommended. The speed mode can realize the nearly linear flow output of the gear pump.
Pump size and Technical data