IMI Hydronic STAP Manual De Instrucciones página 11

Presetting
System with pre-settable valves
1. Fully open all control valves.
2. Adjust all terminal valves to the given design flow.
3. Check the flow across the STAF valve.
4. Adjust the differential pressure (∆p
until the require flow is attained across the STAF valve. Wait 2 – 3 minutes before reading the value.
System with balancing valves
1. Fully open all control valves.
2. Close points (4) and (5). Open any of the points (6) and (8) to move the STAP valve to the fully
open position.
3. Adjust the installation (for example by using TA Balance)
4. Close points (6) and (8) and open point (4) and (5).
5. Adjust the differential pressure (∆p
until the require flow is attained across the STAF valve. Wait 2 – 3 minutes before reading the value.
Maintenance
The STAP valves are maintenance free under the condition that they are used within their normal
application area.
Locking of set ∆p
L
If desired, ∆p can be locked at the set value by turning the shut off handwheel anti-clockwise.
L
Shut-off
Shut-off STAP using the handwheel.
Fig. 1
5 D
2 D
Fig. 2
Inlet
∆H
8
Return
6
IMI Hydronic Engineering retains the right to make changes
to its products and specifications without prior notice.
) using a 5 mm allen key through the shut off handwheel on the STAP
L
) using a 5 mm allen key through the shut off handwheel on the STAP
L
2 D 10 D
3
∆p
4
L
1
7 5
2
6
Table 1
DN
Screw + nut
Number
Nm
Table 2
∆
p
L
kPa
20
L
30
40
50
60
70
80
90
100
110
120
130
140
150
160
*) Delivery setting
65 80 100
M16 M16 M16
4 8 8
90 90 90
Turns from fully
∆
open ( p )
Lmin
20-80 kPa 40-160 kPa
9* -
28 -
41 9*
52 19
63 27
73 35
81 43
- 50
- 57
- 62
- 67
- 71
- 75
- 78
- 81
11