oventrop Hydrocontrol VFC Double Regulating Valve Instruction Manual
- June 13, 2024
- oventrop
Table of Contents
oventrop Hydrocontrol VFC Double Regulating Valve
Presetting
Oventrop DRV and commissioning valves are designed for installation in hot
water heating and chilled water air conditioning systems and serve to achieve
a hydronic balance between the various circuits of the system.
It is important to note that the direction of flow must conform with the
direction of the arrow on the valve body and that the valve must be installed
with a minimum of 3 D (3 x nominal pipe diameter) of straight pipe in the
upstream side. The required preset value can be obtained by reference to the
flow chart appropriate for the size of valve. Any inter-mediate preset value
is available.
The selected preliminary setting can be made from the two-part scale – the basic scale and the fine adjustment scale. A display of the basic setting is available even with the valve fully closed.
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The preset value of the valve is adjusted with the handwheel.
a. The display of the basic setting is shown by the longitudinal scale together with the sliding indicator. Each turn of the handwheel is represented by a line on the longitudinal scale.
b. The display of the fine setting is shown by the peripheral scale on the handwheel and indicates 1/10th of a turn of the handwheel. -
With the valve at the required preset value, turn the inner disc clockwise until it seats. This can be done by using the long end of a 3 mm allen key.
Visibility/Readability of setting scales:
Depending on the installation position of the valve, an improvement in the
visibility/readability of the setting scales is possible by twisting the
scales round. With the valve fully closed and the indicator on ’0’, carefully
remove the cover plug in the centre of the handwheel by using a small
screwdriver in the slot and gently prising it off. Then remove the cover plug,
undo the screw and with a light tug pull the handwheel from the valve spindle.
Next without altering the presetting (still indicating ’0’) adjust the
position of the handwheel, so that the indica-tor window is clearly visible.
Finally refit the handwheel to the valve stem, tighten the screw and replace
the cover plug.
Protecting the setting:
A sealing wire (accessory item no. 1089091) may be threaded through the hole
in the handwheel and a lead seal fitted.
Locking the handwheel:
The handwheel can be locked in any position, by remo-ving the existing
protection cover and replacing it with the cover (accessory item no. 1060180).
In addition, the locked handwheel can be secured with a sealing wire.
For presetting and fine adjustment of the flow volume, Oventrop offers two types of measuring instruments, i.e:
- ”OV-DMC 2“ flow-meter, an advanced programmable microprocessor with memory store and
- Oventrop electronic differential pressure gauge (without microprocessor or memory)
Subject to technical modification without notice.
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D-59939 Olsberg
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