Test Stand for Control Valves

Product Code: RT 390

Test Stand for Control Valves

Product Details

Technical Description
Control valves are an essential part of process and chemical engineering. The connection between controller and plant is realised with control valves as actuators. Control valves are usually used to regulate flows of gases or liquids. Optimum control loop design depends on a sound knowledge of control valve behaviour as well as a knowledge of the controlled system's response.
This mobile test stand allows to investigate and study control valves of different types. For this purpose the valve is installed in a closed water circuit with a pressure pump and a supply tank. Flow rate and pressure drop across the valve are measured. The trigger signal is generated by potentiometers and indicated on a display. Electrically operated motor valves can be investigated as well as pneumatic control valves. A data acquisition system can be used to record and evaluate characteristics and step responses on a PC.

Learning Objectives / Experiments
- Demonstrating and verifying the function
- Measuring pressure drop and flow rate
- Determining the Kvs value
- Plotting valve characteristics
- Recording step responses
- Influence of actuating pressure on positioning velocity of pneumatic valves
- Positioner settings 
- Measuring the leakage rate

* Familiarisation with layout and operation
* Measuring the Kvs value
* Plotting valve characteristics
* Analysing dynamic response
* Servicing and adjustment
[1] Mobile test stand with onboard water supply
[2] Centrifugal pump
[3] Stainless steel tank
[4] Potentiometer as signal transmitter 0(4)...20mA
[5] 2 pressure sensors 0...6bar
[6] Inductive flow meter 0...60ltr/min
[7] Digital displays for pressure before and after the valve, control pressure, control ratio and flow rate
[8] Pressure reducer for actuating pressure
[9] Measured data recording with software for recording valve characteristics, connection to a PC via USB
[10] A range of valves are available under RT 305 (pneumatic, motorised, different characteristics and kvs values)

Technical Data
Supply tank: approx. 75ltr
Centrifugal pump, 2 stages:
- max. head: 20m
- max. flow rate: 4m³/h
- power consumption: 300W
Inductive flow meter: 0...60ltr/min
Pressure sensor: 0...6bar
Digital controller, can be configured as P, PI or PID controller:
- Xp: 0...999.9%
- Tv: 0...1200s
- Tn: 0...3600s
Standardised signal: 0(4)...20mA

Dimensions and Weight
l x w x h : 1250 x 750 x 1500 mm
Weight : approx. 150 kg

230V, 50Hz, 1 phase

Scope of Delivery
1 basic unit, 1 data acquisition software, 1 USB ca´ble, 1 instruction manual

Order Details
080.39000  RT 390  Test Stand for Control Valves
Alternative products
RT 304 -- Calibration Bench
RT 310 -- Calibration Station

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
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