RTK Control valves (MV/PV)

Control valves are essential components of the system. A right selection has a large influence on the stability and performance of the system and the quality of the product in the cold chain. The long time experience of Wijbenga with RTK valves in the refrigeration industry, assures the best selection and execution for each application. The valves are “tailor made” selected and produced for each specific situation.

RTK valves are applicable for controlling or stopping liquid, gas and liquid/gas mixture flows in industrial systems. In refrigeration systems the valves can be used in a large temperature range and for design pressures from PS16 up to PS 160. These valves are excellent fur the use as expansion valves. Special solutions are available in cases of large pressure differential with more stage inserts for more stage expansion. Valves can be executed with PTFE seat ring for bubble tight shut off.

All RTK valves have reliable spindle seals, applicable for many refrigerants as i.e. NH3, CO2 and most synthetic refrigerants. For increased liability in applications below 0˚C a spindle heater must be used. RTK actuators, powered by electricity or pneumatically are available in a number of varieties and options to cover most of the field demands.

Examples of applications:

Expansion valve between high pressure, intermediate pressure and low pressure
Control valve for wet return lines
Control valve for liquid flow
Control valve in compressor suction lines
Discharge gas control valve
Control valve for glycol / brines
Control valves for oil flow

Features:

In conformity with CE-PED
Reliable electric or pneumatically operated actuators with many options
Several control cone shapes (parabolic, perforated, needle, V-form)
PTFE seat seal ring
With satellite hardened seat
Reliable spindle seal with chevrons or bellow
For natural refrigerants as well as for synthetic refrigerants
Available in size DN15 up till DN400
Houses made in cast iron, ductile iron, steel cast and stainless steel
Shape and connections according DIN and ANSI rules
Flanges smooth finish or with groove according DIN

Type encoding:
The RTK valves are encoded with two characters and four digits with the following meanings:

Both characters and the first two digits:

MV 52: motor operated valves for max. forge of 300 kg
MV 53: motor operated valves for max. forge of 600 kg
MV 54: motor operated valves for max. forge of 1000/1500 kg
PV 62: pneumatically operate with membrane surface of 280 cm²
PV 63: pneumatically operate with membrane surface of 530 cm²
PV 64: pneumatically operate with membrane surface of 1000 cm²

Third digit:

1: two way valve
2: three way valve

Forth digit:

1: spindle seal with gland or chevrons
4: spindle seal with bellow

Phonenumber

+31 (0)345-681549