Shaanxi Zhongguan Electric Control DWK3 Series Controllers — DWK3-110CD

Technical Dossier

Product Details And Specifications

Shaanxi Zhongguan Electric Control DWK3 Series: Comprehensive Module Range and Technical Overview

The DWK3 series, manufactured by Shaanxi Zhongguan Electric Control Co., Ltd (陕西中冠电控有限公司), is a line of industrial compensation-type temperature controllers widely deployed in heavy industrial environments across China and export markets. These units are engineered for precision thermal regulation in applications including petrochemical processing, electric furnace control, heat treatment facilities, and power generation auxiliary systems. The DWK3 platform occupies a significant installed base in domestic Chinese industrial facilities, particularly in sectors requiring stable, long-cycle thermal compensation control — including chemical plants, refinery auxiliary systems, and metallurgical furnace operations. Its robust analog and relay-output architecture makes it a standard reference in maintenance catalogs for facilities built between the 1990s and 2010s.

The Evolution of DWK3 Architecture

The DWK3 series represents a mature generation of compensation-based temperature controllers, succeeding earlier electromechanical relay controllers common in Chinese industrial installations of the 1980s. The core architecture relies on thermocouple or thermal resistance (RTD) input signals, processed through analog compensation circuits to drive relay or thyristor (SCR) output stages. Early variants in the DWK3 lineage used discrete analog components with manual calibration; later revisions introduced semi-digital display interfaces while retaining the proven compensation control topology.

The series spans single-channel and multi-channel configurations, with output options including on/off relay, proportional relay, and SCR phase-angle control. Voltage ratings cover 110V AC and 220V AC mains, with control ranges typically spanning 0–400°C, 0–600°C, and 0–1200°C depending on the sensor type paired. As the series has entered its mature/end-of-life phase, new production runs are limited. Facilities operating DWK3 controllers are advised to maintain spare unit inventories, as direct OEM replacements are increasingly sourced through specialist distributors rather than primary channels. Compatibility with legacy thermocouple types (K, E, S, B) and RTD inputs (Pt100) is a key interoperability consideration when planning maintenance or cross-series substitution.

DWK3 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the DWK3 series. Each unit is classified by output type, voltage rating, and control function:

DWK3-110CD: Single-channel compensation controller, 110V AC input, relay output, thermocouple/RTD compatible.
DWK3-220CD: Single-channel compensation controller, 220V AC input, relay output, standard industrial thermal regulation.
DWK3-110SD: Single-channel SCR (thyristor) output controller, 110V AC, proportional phase-angle control.
DWK3-220SD: Single-channel SCR output controller, 220V AC, proportional phase-angle control for resistive loads.
DWK3-110CDA: Enhanced single-channel relay controller, 110V AC, with alarm output relay.
DWK3-220CDA: Enhanced single-channel relay controller, 220V AC, with alarm output relay.
DWK3-110SDA: SCR output with alarm, 110V AC, for furnace and kiln applications.
DWK3-220SDA: SCR output with alarm, 220V AC, dual-function control and fault signaling.
DWK3-2-110CD: Dual-channel compensation controller, 110V AC, independent relay outputs per channel.
DWK3-2-220CD: Dual-channel compensation controller, 220V AC, independent relay outputs per channel.
DWK3-2-110SD: Dual-channel SCR output controller, 110V AC, for multi-zone thermal systems.
DWK3-2-220SD: Dual-channel SCR output controller, 220V AC, multi-zone proportional control.
DWK3-3-220CD: Three-channel relay output controller, 220V AC, for multi-zone furnace control panels.
DWK3-3-220SD: Three-channel SCR output controller, 220V AC, high-density zone management.
DWK3-4-220CD: Four-channel relay output controller, 220V AC, panel-mount multi-zone temperature regulation.
DWK3-4-220SD: Four-channel SCR output controller, 220V AC, for large-scale industrial heating systems.
DWK3-110CD-K: Single-channel relay controller, 110V AC, factory-configured for K-type thermocouple input.
DWK3-220CD-PT: Single-channel relay controller, 220V AC, factory-configured for Pt100 RTD input.

Sourcing Hard-to-Find & Obsolete DWK3 Parts

The DWK3 series has entered its end-of-life phase from the OEM perspective. Shaanxi Zhongguan Electric Control Co., Ltd has reduced active production of this line, and authorized distributor stock is depleted in most regions. DriveKNMS maintains a dedicated inventory program for DWK3 controllers and associated components, sourced through verified secondary market channels and long-term storage partners within China's industrial surplus network.

For facilities requiring lifecycle extension support — including chemical plants, heat treatment workshops, and power utility auxiliary systems still operating DWK3 installations — DriveKNMS provides: verified surplus unit sourcing, functional testing prior to shipment, cross-reference identification for damaged or unreadable nameplates, and technical consultation for identifying compatible substitute models where direct replacements are unavailable. All units are documented with sourcing traceability records upon request.

Quality Control for the DWK3 Range

DWK3 controllers sourced through secondary channels undergo a structured inspection and functional verification process at DriveKNMS. Each unit is subject to: visual inspection of housing, terminal blocks, and display panel for physical damage or corrosion; power-on functional test at rated voltage (110V AC or 220V AC as applicable); input signal simulation using calibrated thermocouple and RTD signal sources across the rated measurement range; output verification — relay contact continuity and switching function, or SCR gate trigger and conduction angle for SD-type units; setpoint accuracy verification against calibrated reference; and alarm output function test for CDA/SDA variants. Units that do not meet functional specifications are quarantined and not offered for sale. Test records are available upon request for critical applications.