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HTS Series twin screw pump
3-A version
Cutaway view
Rotor pitches
The Nova Rotors HTS Series, part of the Raptor range, is a stainless steel hygienic twin screw pump for food, beverage, dairy, cosmetic and pharmaceutical processing. Also known as a sanitary twin screw pump, it uses two synchronised, counter-rotating screws to convey the product axially. This gives low-pulsation flow, gentle handling and high suction capability with low NPSHr.
The rotors do not touch the pump casing, so the pump can run dry with flushed seals. It handles everything from thin liquids to products of up to 1,000,000 cP, including suspended and abrasive solids. Its ability to pump at both process and CIP flow rates means product transfer and cleaning in place can be carried out with a single pump.
Typical applications include:
| Specification | Description |
|---|---|
| Max flow rate | Up to 200 m³/h (at 0 bar, largest rotor pitch) |
| Max pressure | Up to 25 bar |
| Temperature range | -40 °C to +150 °C (130 °C product / 150 °C cleaning as standard; higher on request) |
| Max viscosity | Up to 1,000,000 cP |
| Max solid passage | 16 mm (HTS 2), 24 mm (HTS 4), 30 mm (HTS 6), 40 mm (HTS 8) |
| Casing | AISI 316 / 316L stainless steel (Kolsterising hardening option for abrasive products) |
| Rotors | AISI 316 stainless steel (Duplex F51 / Superduplex F55 on request) |
| Sealing shaft | AISI 630 (Duplex F51 / Superduplex F55 on request) |
| Gaskets | H-NBR, EPDM, FPM, FFPM (FDA approved) |
| Surface finish | Ra < 0.8 µm on wetted surfaces |
| Seals | Single or double acting hygienic balanced mechanical seal, convertible with a rebuild kit |
| Connections | DIN 11851, DIN 11864, Clamp ISO 2852 / ASME-3A / DIN 32676, RJT, SMS 1145, Macon |
| Certifications | CE; EHEDG compliant design; 3-A Sanitary Standard certified version available; FDA-approved elastomers, with FDA / EC 1935/2004 material traceability on the 3-A version |
| Dry running | Possible with flushed seals |
| Rotation | CW and CCW |
Smallest size: compact pump for low flow rates and small process lines.
Max flow 27 m³/h
Max speed 3,600 rpm
Max pressure 25 bar
Max solid size 16 mm
Models HTS 2-1 to 2-4 (four rotor pitches)
Mid-range size for medium flow rates and general hygienic transfer duties.
Max flow 65 m³/h
Max speed 3,600 rpm
Max pressure 25 bar
Max solid size 24 mm
Models HTS 4-1 to 4-4 (four rotor pitches)
Large size for high flow rates and bigger solids at lower speed.
Max flow 100 m³/h
Max speed 3,000 rpm
Max pressure 25 bar
Max solid size 30 mm
Models HTS 6-1 to 6-4 (four rotor pitches)
Largest size for the highest flow rates and the largest solids.
Max flow 200 m³/h
Max speed 2,500 rpm
Max pressure 25 bar
Max solid size 40 mm
Models HTS 8-1 to 8-4 (four rotor pitches)
A twin screw pump is a rotary positive displacement pump. Two intermeshing screws, driven by timing gears so that they rotate in opposite directions, carry the product axially through the casing in a smooth, low-pulsation flow.
A progressive cavity pump uses a single rotor turning inside an elastomer stator. Because the HTS Series rotors do not touch the pump casing, the pump can run at high speeds and can run dry with flushed seals. It also pumps both the product and the CIP solution with the same pump.
The HTS Series is the hygienic twin screw pump Tapflo UK offers, and we also supply Nova Rotors progressive cavity pumps. Our engineers can advise which pump type best suits your process.
Yes. Because the rotors run clear of the pump casing, dry running is possible when the pump is fitted with flushed mechanical seals. Speak to our team about the seal configuration and flushing arrangement for your application.
Yes. The HTS Series is designed for CIP and process duty with a single pump. Its hygienic design has no dead zones, while FDA-approved elastomers and a wetted surface finish of Ra < 0.8 µm support thorough cleaning. The 3-A version adds full drainage and certified CIP/SIP compatible geometries, and is supplied with CIP/SIP documentation and official 3-A marking.
The HTS Series handles products from thin liquids up to 1,000,000 cP, including liquids containing suspended or abrasive solids. Flow rates range up to 200 m³/h (at 0 bar, largest rotor pitch) with pressures up to 25 bar. Four sizes are available: HTS 2 (up to 27 m³/h), HTS 4 (up to 65 m³/h), HTS 6 (up to 100 m³/h) and HTS 8 (up to 200 m³/h). Each size is offered in four models with different rotor pitches. Operating temperatures range from -40 °C up to 130 °C for product and 150 °C for cleaning (higher on request).
Connections include DIN 11851, DIN 11864, Clamp ISO 2852, ASME-3A and DIN 32676, RJT, SMS 1145 and Macon, with other standards on request. The pump is CE marked and has an EHEDG compliant design, and a 3-A Sanitary Standard certified version is available. All versions use FDA-approved elastomers; the 3-A version adds full FDA / EC 1935/2004 material traceability and official 3-A marking.
Yes. The HTS Series is a hygienic twin screw pump with an EHEDG compliant design. It is also available as a 3-A Sanitary Standard certified version for hygienic twin screw pump duties.
The 3-A version uses FDA / 3-A compliant materials for all product-contact parts, with 3-A compliant flushed or double mechanical seals and front-facing gaskets without stagnation zones. The pump body has full drainage capability, no dead zones and certified CIP/SIP compatible geometries. It is fitted with DIN 11864 hygienic fittings, a stainless steel motor or protective stainless steel motor cover, and a hygienic baseplate with 3-A adjustable feet.
Each 3-A pump is supplied with full material traceability (FDA / EC 1935/2004), manuals and CIP/SIP documentation compliant with 3-A requirements, and official 3-A marking on the pump body.