KEES VAN DER WESTEN SLIM JIM (DUETTE & TRIPLETTE)

The Slim Jim espresso machine brings Kees van der Westen’s multi-boiler engineering to Indian specialty cafés, in Duette (2-group) and Triplette (3-group) formats. Independent 316L stainless steel boilers, saturated groups, and spring-loaded pre-infusion deliver café-grade consistency at volume. Built for teams who need power without compromising on countertop footprint.

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Description

01 / The Machine

Multi-Boiler Power, Built for Indian Volume

Back-to-back shots expose the weak point of most espresso machines: temperature drift. The Slim Jim espresso machine, engineered by Kees van der Westen, gives every group its own boiler so high-volume cafés never trade consistency for speed.

Engineered Around Thermal Stability

Every brew group on the Slim Jim is welded directly to its own 0.8L, 316L stainless steel coffee boiler — a saturated group design that keeps puck temperature virtually identical to the PID-set boiler temperature. An intelligent thermo-syphon pre-heats incoming water through the steam boiler’s internal heat exchanger, while an electronic sensor at the distribution block fine-tunes temperature with cold-water injection, even during rush hour.

Slim Jim espresso machine internal hotspots showing boiler and pre-infusion system

Why Cafés Choose It

Built For High-Volume Bars

  • Independent 316L stainless steel boiler per brew group
  • 10.5L insulated steam boiler with three heating spirals
  • Slim stainless steel body for compact bar layouts
  • Spring-loaded pre-infusion for even, channel-free extraction
  • Redundant probe systems guard against dry-heating and over-pressure
02 / Engineering

Inside the Slim Jim Espresso Machine

01

Multiple Boiler System

Independent 316L stainless steel boilers for every group plus one 10.5L steam boiler resist water-borne corrosion and hold temperature under continuous use.

02

Saturated Group Design

The group head is welded to the 0.8L coffee boiler, so water at the puck matches the PID-controlled boiler temperature almost exactly.

03

Intelligent Thermo-Syphon

An electronic sensor monitors the distribution block and injects cold water via a mixing chamber to hold precise extraction temperature during peak service.

04

High-Volume Steam

Three heating spirals, managed by solid-state relays, deliver dry, consistent steam power from the insulated 10.5L boiler.

05

Versatile Hot Water

Choose an adjustable 60–100°C mixed flow for Americanos and tea, or a direct-from-boiler toggle for true boiling water.

06

Spring-Loaded Pre-Infusion

A double-spring piston builds pressure to roughly 4.5 bar, swelling the coffee bed and sealing against channeling before full extraction pressure.

03 / Choose Your Format

Duette vs Triplette

Feature Duette (2-Group) Triplette (3-Group)
Coffee Boiler 0.8L per group (316L Stainless) 0.8L per group (316L Stainless)
Steam Boiler 10.5L (316L Stainless) 10.5L (316L Stainless)
Steam Heating Power 4,800W / 6,000W 4,800W / 6,000W
Coffee Heating Power 2 x 450W 3 x 450W
Peak Power (No Pump) 6,325W – 7,975W 6,775W – 7,975W
Electrical Configuration 220–240V, 50–60Hz, 1 or 3-Phase 220–240V, 50–60Hz, 1 or 3-Phase
Questions

Slim Jim Espresso Machine FAQs

What is the difference between the Duette and Triplette?

The Duette is a 2-group configuration and the Triplette is a 3-group configuration; both share identical boiler materials, pre-infusion design, and steam power specifications.

Can steaming controls be upgraded?

Yes. Standard turning knobs can be upgraded to toggle levers or foot-activated air-bulb switches, letting baristas texture milk hands-free.

Does the Slim Jim support both single and three-phase power?

Yes. It runs on 220–240V, 50–60Hz, and is available in 1-phase or 3-phase electrical configurations.

How does pre-infusion work on this machine?

A double-spring piston inside a dedicated pre-infusion cylinder raises pressure gradually to around 4.5 bar before full extraction pressure, sealing the coffee bed against channeling.

What safety systems protect the boilers?

Redundant probe systems prevent dry-heating, while electronic cut-outs and safety valves guard against over-pressure or overheating in both the coffee and steam systems.

For Serious Cafés

Who the Slim Jim Espresso Machine Is For

This is a machine for high-volume specialty cafés across India that need multi-boiler stability, precise pre-infusion, and a slim stainless steel footprint without compromise. Choose the Duette for compact two-group bars or the Triplette for busy three-group operations.

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