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Tuesday, April 9, 2019

Valve Handbook (Free PDF)




File Size: 16.50 Mb

Description
Water is the most common energy carrier for heating and cooling of buildings. Its energy is transferred via radiators, heating or cooling batteries, fan-coil units, etc.

The heating and domestic hot water needs of a building are constantly changing throughout the day, while being affected by conditions in- and outside the building.

In order to maintain good heating and tap water comfort, a control system is required that constantly detects current needs and which is capable of countering fluctuations. But even using the most sofisticated control system, valve performance and control characteristics are still of vital importance. Leaking valves with unstable control qualities mean large operational costs and poor quality of comfort.

Content:-
1. Control functions in water systems
2. Types of valves
3. Pressure balancing in valves
4. Other types of valves
5. The design and function of control valves
6. Valve sizes DN
7. Nominal pressure and pressure rating PN
8. Connection methods
9. Face-to-face dimensions for flanged valves
10. Flow characteristics
11. What is the practical use of flow characteristics?
12. Pressure drop
13. Valve sizing (kv- and kvs values)
14. Pressure drop diagrams simplify calculations
15. The Regin valve sizing calculator
16. Control range and accuracy
17. Stroke
18. Over- and undersized valves
19. Valve tightness
20. Tight valves conserve energy
21. Sizing of domestic hot water control valves
22. 3-way valves
23. Radiator systems and radiator valves
24. Valve materials
25. Damages
26. Electromechanical actuators
27. Thermal actuators
28. Regin’s Valve Centre





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