Control
TR-1 · single-pole regulating thermostat
The stem's thermal expansion opens a snap-action switch and holds the water at the set temperature.
- Connection for a signal lamp
BALÇIK TORMEC stem-type thermostats
Control and safety in one head, plugged onto the element.
A rigid sensing stem in the pocket tube acts on a snap-action switch: direct switching without electronics, tolerant of the humidity and temperature inside a water-heater terminal cover.
BALÇIK TORMEC acquired the Italian brand Tormec in 2006; today stem thermostats are designed and manufactured by BALÇIK TORMEC for storage water heaters, boilers and some industrial tanks. The current range covers the TR-1 regulating and DST double-safety stem thermostats, supplied separately or fitted to our water-heater elements.
TR-1 · DST
Applications · where they work
Storage water heaters, boilers and tanks.
The stem senses the water through a pocket next to the element and switches the heater directly.
Key specifications
Typical values for water-heater duty.
From our specifications master. Settings, stem length and terminals are configured per project.
| Parameter | Typical series value |
|---|---|
| Stem diameter and length | Ø 6 mm stem; stem lengths 180 – 450 mm typical (e.g. 180, 220, 275, 350, 450 mm) |
| Materials | Stem: brass, copper or stainless steel; housing: thermoset or thermoplastic insulating body; contacts: silver alloy |
| Regulating range | Adjustable 20 – 70 °C as standard (e.g. 30 – 75 °C on request; hot water typically set at 55 – 65 °C); maximum set point always below the safety cut-out; fixed setting on request |
| Safety cut-out | Fixed, 90 °C as standard (75 – 120 °C on request); manual reset (non-self-resetting) for storage water heaters, automatic reset only where the appliance standard allows it |
| Switching capacity | 16 A at 250 V AC |
| Voltage | 230 V AC |
| Terminal types | 6.3 mm flat tabs, screw terminals, M4 studs; earth connection via mounting bracket |
| Mounting | Bracket clamped to element flange, pocket tube Ø 8 – 10 mm; adjusting knob or screwdriver setting |
Values are typical; the final design is confirmed by BALÇIK TORMEC engineering. All product groups: Specifications by product group.
Versions
One platform, two versions.
How the temperature is controlled, how the safety limiter acts and who sets the temperature – every version plugs directly onto the heating element.
Control and safety
DST · double-safety stem thermostat
Bipolar stem-type regulating thermostat and a double-pole safety cut-out in one head: on over-temperature the cut-out opens both poles and stays open until reset by hand. 16 A, 250 V~, single phase · control range 20–70 °C (30–75 °C on request), differential 8 ± 4 K · safety cut-out 90 °C as standard (75–120 °C on request) · brass stem Ø6 mm, 180 – 450 mm · 6.3 mm fast-on terminals.
- Stem-actuated limiter, or an independent bimetal limiter as an option
Brochure of the hybrid (electronic) stem thermostat: PDF · online flip-book.
Technical drawing · TR-1 and DST
A stem that senses, a switch that snaps, a cut-out that stays open.
The stem sits in the pocket tube next to the element. Its expansion drives the snap-action switch of the regulating contact; a separate safety cut-out opens on over-temperature and needs a manual reset.
One supplier for element and control
Matched assemblies, fewer interfaces.
Specifying element and thermostat together removes a supplier interface and a wiring step from your line – and puts one engineering team behind the assembly.
- Plugs directly onto the element – less wiring and lower mounting cost than a separately mounted thermostat.
- Specified together through co-design: stem length, pocket position, settings and terminals.
- Calibrated in a computerised process and protected by a tamper-proof housing.
- Earth connection through the mounting bracket.
Design considerations
Four choices that decide how the water heater behaves.
Stem, contacts, cut-out and the control standard – fixed on the drawing together with the element.
Stem length and position
The stem senses the water around it. Its length – 180, 220, 275, 350 or 450 mm – and the pocket position decide which water layer the thermostat controls.
Contacts and current
Silver-alloy contacts rated 16 A at 250 V AC single-pole. Size the rating to the element current: a 3000 W element at 230 V draws about 13 A.
Safety cut-out
Fixed, 90 °C as standard (75 – 120 °C on request), always above the highest set point and independent of the setting knob. Manual reset for storage water heaters; automatic reset only where the appliance standard allows it.
Control standards
Designed to EN 60730-1 and EN 60730-2-9 (automatic electrical controls, temperature sensing controls); RoHS and REACH declarations available.
Validation: each thermostat is calibrated in a computerised process; element-and-thermostat assemblies are checked in our validation laboratory – functional check, dielectric strength, insulation resistance and leakage current. How we test – quality and laboratory
Liquid heating elementsFlange elements the thermostat plugs onto
CataloguesArchive editions, including the 2016 brochure
Energy efficiencyHow control accuracy affects losses
Co-designElement and thermostat specified together
CertificatesISO 9001 and declarations
Download centreCertificates and declarations
Video · on YouTube
How a TR-1 stem thermostat is made.
A short film from our YouTube channel on the production of BALÇIK TORMEC stem-type thermostats in Ankara.
Online catalogue
TR-1 and DST in our online catalogue.
Data sheets of the single-pole regulating thermostat and the regulating and safety combination.
Related
Controls, elements and the process behind them.
Liquid heating elementsFlange and screw-in elements the thermostat plugs onto
Nickel diffusion coatingCorrosion and scale protection for water-side sheaths
Co-design processMatched element and control, from drawing to sample
CertificatesISO 9001, VDE approvals and declarations
GlossaryCut-out, differential, stem and other terms
Specifications by product groupAll groups side by side
Specify the element and its control in one drawing.
Send the tank volume, element power, voltage and required settings. We propose stem length, pocket position and cut-out temperature together with the element.
