Bornemann SLH-5G Twin Screw Pumps. Hygienic transfer and CIP flow from one platform.
Bornemann SLH-5G is a hygienic twin screw pump platform for processors who need more than basic transfer. The pump uses contact-free intermeshing screws to move product axially from suction to discharge, giving plants a serious option for low-pulsation positive-displacement flow, product-protective handling, broad speed range, and process transfer plus cleaning-flow review from one pump platform.
Contact-free twin screw pumping for controlled transfer and cleanable process design.
SLH pumps are rotary positive-displacement pumps. Two intermeshing screws and the pump housing form sealed chambers that carry product along the screw axis. Bornemann's hygienic SLH design was introduced to food and pharma in 2004, backed by more than 170 years of Bornemann twin screw technology and more than 15,000 installed SLH pumps worldwide. Because the screws work without metal-to-metal contact in the product zone, the platform can be evaluated for abrasive products, shear-sensitive products, viscous fluids, and hygienic applications where low pulsation and cleanability matter.
Product movement along the screw axis
Bornemann positions the axial conveying principle as product-protective, helping maintain size, surface, and visual integrity for many sensitive products when the pump is correctly selected.
Process flow and cleaning flow review
The value is not just transfer. SLH can be evaluated where one pump may need to run at one speed for product and another speed for cleaning flow through the process path.
No dead zones, self-draining design
Current SLH-5G literature calls out hygienic design details including no dead zones, self-draining design, 3-A/EHEDG, and standard 32Ra surface finish.
SLH-5G performance range, applied to the duty.
Bornemann SLH-5G data gives the selection envelope. Triplex uses the actual flow, viscosity, pressure, suction, temperature, cleaning, and seal requirements to narrow that range to the right pump configuration.
SLH-5G selections can include product temperature up to 150 deg C / 302 deg F, maximum temperature difference from 4 deg C to 95 deg C, and suction lift up to 25 ft / 8.5 m. Viscosity, suction lift, temperature, and pressure limits must be matched to the exact model, screw pitch, product behavior, inlet conditions, NPSH/NPSHa margin, seal plan, materials, speed, pressure, and controls.
| Published SLH-5G model | Max flow | Max differential pressure | Max temperature | Common connection note |
|---|---|---|---|---|
| SLH-5G 1000 | 20 m3/h / 88 gpm | 25 bar / 363 psi | 150 deg C / 302 deg F | 2 in tri-clamp or DN50 DIN 11851 |
| SLH-5G 2000 | 80 m3/h / 352 gpm | 25 bar / 363 psi | 150 deg C / 302 deg F | 2.5 in tri-clamp or DN65 DIN 11851 |
| SLH-5G 3000 | 175 m3/h / 771 gpm | 25 bar / 363 psi | 150 deg C / 302 deg F | 3 in tri-clamp or DN80 DIN 11851 |
| SLH-5G 4000 | 300 m3/h / 1,321 gpm | 25 bar / 363 psi | 150 deg C / 302 deg F | 4 in tri-clamp or DN100 DIN 11851 |
SLH-5G is a configured pump, not a one-size-fits-all SKU.
The engineering conversation should start with the product and duty cycle, then move into screw set, port size, seals, materials, finishes, temperature control, and documentation.
| Configuration area | Bornemann configuration detail | Triplex selection note |
|---|---|---|
| Hydraulics | Multiple model sizes, standard screw-pitch choices, and multiple port sizes are published for the SLH-5G family. | Use flow, pressure, viscosity, product sensitivity, and CIP flow target to narrow the screw set. |
| Hygienic construction | 3-A and EHEDG are published for SLH-5G hygienic configurations; standard tri-clamp fittings, hygienic design with no dead ends/dead zones, and standard 32Ra / Ra <0.8 micrometer finish are also published. | Confirm the exact hygienic documentation and surface finish required by the customer or project. |
| Materials and wear | Product-contact 316L stainless steel, hardened screws, and hardening options are available for demanding products. | Review abrasiveness, solids, cleaning chemistry, product compatibility, and expected wear mode. |
| Connections | SLH-5G literature lists S-line tri-clamp, DIN 11851, DIN 11864-2, SMS 1146, and other connections upon request. | Match the pump ports to the installed piping, hygienic standard, and any drop-in replacement requirement. |
| Seals and temperature | Multiple seal options, single/double mechanical seals, heating/cooling casing jackets, and thermal-resistance options support a wide range of process duties. | Seal plan and temperature-control choices are central for viscous products, dry-running risk, CIP, and thermal cycling. |
| Maintenance and retrofit | The current patented SLH-5G design is published for maintenance without disassembling the bearing unit, plus built-in exchangeability with predecessor SLH-Series pumps. | Useful when a plant is replacing an older SLH pump or wants to reduce downtime during seal, inspection, or service work. |
| Regulatory materials | USP Class VI, NSF, and FDA-compliant materials/options are applicable for defined configurations only. | Do not assume universal compliance. Confirm the exact elastomers, materials, and documentation package before quoting. |
Where the SLH conversation usually starts.
Bornemann SLH-5G pumps are used across hygienic and sanitary process applications where low pulsation, cleanability, viscosity handling, and product integrity matter. Triplex still needs the actual duty point before recommending a model.
Food and beverage
Soups, stews, tomato paste, vegetables, dressings, chocolate, fats and oils, batters, cream fillings, brewery, wort, soft drinks, fruit drinks, and meat processing.
Dairy processing
Cream, milk, cheese curd and whey, cottage cheese, and yogurt where low pulsation, cleanability, and product integrity can matter in the same duty.
Pharma, cosmetics, and high viscosity
Pill pastes, syrups, extracts, slurries, creams, lotions, hair gels, soaps, cosmetics, resins, polymers, sludges, oils, and lubricants.
Product plus CIP capability is real. It still has to be engineered.
Twin screw pumps earn attention because they may reduce separate pumps, bypasses, valves, and controls in the right process layout. The mistake is treating that as automatic.
| Question | Why it matters | What Triplex checks |
|---|---|---|
| What flow is required for product and for cleaning? | Product transfer and CIP can sit at very different operating points. | Line size, required cleaning velocity, pressure drop, circuit restrictions, and speed range. |
| Will the product reliably feed the pump? | High viscosity, poor flow, temperature change, entrained air, or solids can create inlet problems before the pump ever builds pressure. | Suction conditions, NPSH margin, product temperature, inlet geometry, elevation, and upstream equipment. |
| What is the product risk? | Particles, texture, shear sensitivity, abrasiveness, and product value all change the right screw, speed, and material choices. | Solids size/firmerness, acceptable product damage, viscosity range, abrasiveness, and required finish. |
| What documentation is required? | Food, dairy, pharma, and cosmetic duties can require different material, finish, elastomer, and validation records. | 3-A/EHEDG expectations, FDA/NSF/USP Class VI requirements, certificates, and project turnover documents. |
Bornemann SLH-5G resources for sizing and selection.
Use these resources to review the SLH-5G construction, published operating range, hygienic design details, and available configuration options before a sizing conversation. Triplex keeps the current brochure and 2026 flyer available here for quick engineering reference. O&M manuals, seal details, and project documentation depend on the exact pump size, materials, seals, and order history; send us the pump tag, serial number, or duty point and we can help track down the correct ITT Bornemann documentation.
| Resource | Use it for | Link |
|---|---|---|
| ITT/SPX channel announcement | Bornemann availability through the Waukesha Cherry-Burrell U.S. channel network. | Open announcement |
| Bornemann twin screw overview | General Bornemann twin screw operating principle, advantages, and broad application scope. | Open Bornemann page |
| Bornemann SLH-5G product page | Hygienic SLH-5G positioning, technical data, operating principle, applications, and resources. | Open SLH-5G page |
| Bornemann SLH-5G brochure | Technical overview, construction details, options, model data, and application examples. | Download PDF |
| Bornemann SLH-5G flyer | Customer-facing summary of dual-duty, hygienic, feature, and configuration claims. | Download PDF |
| Triplex pump application datasheet | Capture the flow, pressure, temperature, viscosity, cleaning, suction, solids, and seal data needed for sizing. | Download datasheet |
| Triplex RFQ | Start a Bornemann sizing review with Triplex. | Request a quote |
Plain-language selection answers.
What makes the Bornemann SLH-5G different from a conventional sanitary PD pump?
The SLH-5G is a hygienic twin screw pump using contact-free intermeshing screws to move product axially. That gives it a broad speed range and makes it worth evaluating where product transfer, low pulsation, product integrity, and cleaning flow all matter.
Can Bornemann SLH-5G replace a separate CIP pump?
Sometimes, but not automatically. Bornemann positions SLH for conveying and cleaning with one pump, but the line size, required cleaning velocity, circuit restrictions, pressure drop, temperature, controls, suction conditions, and plant cleaning standard decide whether one pump can cover both duties.
Are all Bornemann twin screw pumps sanitary?
No. Bornemann has broad industrial twin screw technology. The SLH family is the hygienic platform. Sanitary, aseptic, FDA, NSF, USP Class VI, CIP, SIP, material, and documentation requirements must be confirmed for the exact model and configuration.
Need to know whether Bornemann belongs in the quote?
Send the duty point and current pump problem. Triplex will compare Bornemann, WANGEN, Waukesha UTS, rotary lobe, centrifugal, or other options before the recommendation gets locked in.
