Group: Alfa Laval
Catalog excerpts
Viscochief MKII Viscosity Control System Fig. 1. Viscochief MKII – Viscosity Control System. Application The Viscochief MKII system is specifically designed for installation in fuel oil conditioning systems to automatically monitor and control fuel oil viscosity. System concept The key components of the Viscochief MKII system are: • EVT20 sensor. • EPC50V control unit. The Viscochief MKII components are designed for installation in booster systems equipped with HEATPAC electric heaters or steam/thermal oil heaters from Alfa Laval. Steam/thermal oil heaters from other makers can also be used. The Viscochief MKII system can also be used for upgrading existing booster systems equipped, for example, with conventional capillary viscometers. Features and benefits Design features: • No moving parts. • Robust design. • Full-flow measurement. • Simultaneous display of viscosity and temperature. • Dual fuel operation modes as standard. • Control of complete changeover valve function for changing DO to HFO and vice versa. Customer benefits: • Optimal burning efficiency. • Prevention of engine damage. • Ease of installation. • Start-and-forget operation. • Maintenance-free. • Local and/or remote operation. • High accuracy.
Open the catalog to page 1System working principle The EVT20 viscosity sensor continuously monitors the viscosity of the fuel oil being fed to the engine. This measurement is compared with a set value stored in the EPC50V control unit. The control unit then regulates the heater to raise or lower the fuel oil temperature to maintain the required oil viscosity. When the maximum steam capacity is reached and additional heating is required to maintain the injection viscosity at setpoint, the EPC50V turns on the HEATPAC EHS electric heater to reach the required temperature and viscosity. When installed with a HEATPAC EHS...
Open the catalog to page 2Main system components EPC50V viscosity control unit The EPC50V control unit contains an electronic controller, which regulates electric or steam heaters. It also provides power for the viscosity sensor and the optional regulating valve. There are two models available: a local solution that has a control unit with a built-in operator’s panel and a remote solution that has a local I/O unit and a separate operator’s panel intended for remote positioning in the control room. Viscosity sensor The EVT20 electronic viscosity sensor is designed for full-flow installation in booster systems. The...
Open the catalog to page 3Optional equipment Operator’s panel EPC50V Power supply: Power consumption: Material (cabinet): Protection class: Ambient temperature (max.): 230 VAC, 50/60 Hz 230 VA Steel IP65 55°C Output signals Alarm, common Alarm, high temperature/low viscosity low temperature/high temperature Steam-regulating valve, increase/decrease Electric heater Viscosity: 4–20 mA (optional) Temperature: 4–20 mA (optional) Three-way valve control Field bus interface: Profibus or Modbus (optional) Input signals Viscosity Temperature Dimensions Height: Width: Depth: Weight: EVT20 sensor Measuring range: Accuracy...
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