Danfoss WVTS Data sheet
Data Sheet
Water regulating valves
Type WVTS
Thermostatic operated water valve
Opens on rising sensor temperature
Thermostatic operated water valve type WVTS is suitable for controlling the temperature of a flow of water or neutral brine.
WVTS opens on rising sensor temperature and is indirect servo operated thermostatic valve.
It is suitable for controlling temperature in industrial applications by regulating the quantity of cooling water or neutral brine that cools down the process.
The valves are self-acting, i.e. they operate without the supply of auxiliary energy such as electricity or compressed air.
The required temperature is maintained constant without unnecessary use of cooling water in cooling systems.
The operating economy and-efficiency are maximized.
Features:
• Insensitive to dirt
• Insensitive to water pulsating pressure
• Proven reliable through decades
• Easy to service
• Built-in pilot ƒlter
• Long lifetime
• High performance
• Very high capacity
• Both welding and thread connection flanges
AI214786434421en-000602
Water regulating valves, Type WVTS
Product speci€cation
Technical data
Table 1: Type and media
Type |
WVTS for neutral media |
Operation |
Servo-operated |
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Table 2: Sensor side
Temperature range |
0 – 30 °C |
25 – 65 °C |
50 – 90 °C |
Max. sensor temperature |
57 °C |
90 °C |
125 °C |
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Table 3: Liquid side
Features |
Description |
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Media |
Fresh water, neutral brine |
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Media temperature range |
- 25 – 90 °C |
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Permissible working pressure PB |
10 bar |
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Max. test pressure |
16 bar |
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Opening di†erential pressure |
WVTS 32 |
– WVTS 40: min. 0.5 bar; max. 4 bar |
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WVTS 50 |
– WVTS 100: min. 0.3 bar; max. 4 bar |
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Valves are supplied with capillary tube gland. Di†erent lengths of capillary tube are available.
If WVTS is required with an opening di†erential pressure of 1 – 10 bar, the valve servo spring must be replaced. See Ordering.
Material
Parts in contact with the medium.
Figure 1: WVTS 32
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Figure 2: WVTS 40
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© Danfoss | Climate Solutions | 2021.03 |
AI214786434421en-000602 | 2 |
Water regulating valves, Type WVTS |
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Figure 3: WVTS 50 – WVTS 100 |
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1. |
Sensor |
2. |
Gland |
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3. |
Bellows element |
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5. |
Regulating nut |
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6. |
Setting element housing |
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6a. |
Cover |
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7. |
Pilot oriƒce assembly |
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10. |
Insulating washer |
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15. |
Servo piston |
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20. |
Filter cartridge (self-cleaning) |
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21. |
Equalising oriƒce |
The valve body is made of cast iron with pressed-in bronze seat. The pilot oriƒce assembly (7) consists of a housing with seat and pilot cone of stainless steel. A ƒlter cartridge (20) is built into the valve cover. Here the equalising oriƒce is protected by a replaceable ƒlter.
The bellows in the bellows element (3) are of tin bronze. In designing WVTS, great emphasis was placed on producing a valve with a completely tight seat and no external leakage. The servo piston was therefore ƒtted with a ring of special rubber that creates an elastic seal against the valve seat.
A specially designed rubber sleeve ensures that the servo piston moves in the cylinder with minimum friction. External valve leakage is prevented at the pilot cone where the spindle is ƒtted with Teflon cupwashers. Cover gaskets and pilot channel seals are rubber.
The water-tight rubber seal between cover (6a) and housing (6) ensure that moisture cannot enter and freeze up the spindle. The insulating washer (10) prevents heat transmission between valve body and setting element housing.
© Danfoss | Climate Solutions | 2021.03 |
AI214786434421en-000602 | 3 |
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