oventrop Hydrocontrol VFC Cast-Iron Calibrated Balancing Valves Instruction Manual

: June 3, 2024
: oventrop

Table of Contents

oventrop Hydrocontrol VFC Cast-Iron Calibrated Balancing Valves
General information
Safety notes
- Possible dangers at the installation location
- Packaging
Technical data
- Materials
Construction and function
Installation
Operation
Accessories
Maintenance
Warranty
OVENTROP GmbH & Co.KG
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

oventrop Hydrocontrol VFC Cast-Iron Calibrated Balancing Valves

oventrop-Hydrocontrol-VFC-Cast-Iron-Calibr-PRODUCT

Read installation and operating instructions in their entirety before installing the double regulating and commissioning valve! Installation, initial operation, operation and maintenance must only be carried out by qualified tradesmen! The installation and operating instructions, as well as other valid documents, must remain with the user of the system!

General information

Information regarding the installation and operating instructions

This installation and operating instructions serve the installer to install the double regulating and commissioning valve professionally and to put it into operation. Other valid documents – manuals of all system components as well as valid technical rules – must be observed.

Keeping of documents

This installation and operating instructions should be kept by the user of the system.

Copyright

The installation and operating instructions are copyrighted.

Symbol explanation

Safety guidelines are displayed by symbols. These guidelines are to be observed to avoid accidents, damage to property and malfunctions.

DANGER: indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING: indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION: indicates a hazardous situation which, if not avoided, may result in minor or moderate injury.

Safety notes

Correct use

Safety in operation is only guaranteed if the valve is used correctly. Oventrop double regulating and commissioning valves “Hydrocontrol VFC/VFR/VFN/VGC“ are installed in hot water central heating and chilled water A/C systems with a closed water circuit and serve to achieve a hydronic balance between the various circuits of the system. Any use of the valve outside of the above applications will be considered as non-compliant and misuse. Claims of any kind against the manufacturer and/or his authorised representatives due to damages caused by incorrect use cannot be accepted. The observance of the installation and operating instructions is part of the compliance terms.

Possible dangers at the installation location

WARNING: Heavy valve!

Risk of injury! Suitable transport and lifting devices are to be used. Wear suitable protective clothing (e.g. safety shoes) during installation and use
safety devices. External components like handwheels or pressure test points must not be misused for the absorption of external forces, e.g. as a connection point for lever tools etc.

Hot or cold surfaces!

Risk of injury! Do not touch the valve without safety gloves. It may get very hot during operation.

Sharp edges!

Risk of injury! Only touch with safety gloves. Threads, bore holes and edges are sharp.

Small pieces!

Risk of ingestion! Store and install the valve out of reach of children.

Allergies!

Health hazard! Do not touch the valve and avoid any contact if allergies against the used materials are known.

The case of an external fire has not been taken into consideration when constructing the valve.

Transport, storage and packaging
3.1 Transport inspection
Upon receipt check delivery for any damages caused during transit.
Any damage must be reported immediately upon receipt.
Storage

The double regulating and commissioning valve must only be stored under the following conditions:

Do not store in open air, but dry and free from dust.
Do not expose to aggressive fluids or heat sources.
Protect the valve from direct sunlight and mechanical agitation.
Storage temperature: -20 up to +60°C / -4°F up to 140°F, max. relative humidity of air: 95 %

Packaging

All packaging material must be disposed of environmentally friendly.

Technical data

Performance data

DN 200 – DN 400	Hydrocontrol
VFC	VFR
Operating temperature ts	min.
°F	-10 °C / 14 °F
max.	150 °C / 302 °F
Operating pressure ps	max.

The double regulating and commissioning valves “Hydrocontrol VFC“ PN 16 and “Hydrocontrol VFR“ can be used for cold water up to PN 20.
The double regulating and commissioning valves “Hydrocontrol VGC“ sized DN 300 can be used for a max. operating pressure up to 1600 kPa / 230 psi.

Fluids: Non-aggressive fluids (e.g. water and suitable water and glycol mixtures according to VDI 2035). Not suitable for steam or oily and aggressive fluids. The bronze double regulating and commissioning valves “Hydrocontrol VFR“ can also be used for cold salt water (max. 38 °C / 100 °F) and domestic water.

DANGER: **** Suitable measures (e.g. safety valves) have to be taken to ensure that the maximum operating pressures and maximum and minimum operating temperature are not exceeded or undercut.

Materials

“Hydrocontrol VFC“
- Round flanges according to DIN EN 1092-2, PN 16
- Round flanges according to DIN EN 1092-2, PN 6
- Hole circle of the flanged connection according to ANSI 150

Valve body (DN 200 – DN 300 made of cast iron GG 25 / EN-GJL-250 according to DIN EN 1561; DN 350 and DN 400 made of nodular cast iron GGG 50 / EN-GJS-500-7 according to DIN EN 1563), Bonnet (DN 200 – DN 300 made of nodular cast iron GGG 40 / EN-GJS-400-15 according to DIN EN 1563; DN 350 and DN 400 made of nodular cast iron GGG 50 / ENGJS- 500-7 according to DIN EN 1563), disc made of bronze, stem made of dezincification resistant brass, disc with PTFE or EPDM seal. Maintenancefree stem seal due to double EPDM O-ring.

“Hydrocontrol VFR“, round flanges according to DIN EN 1092-2, PN 16 Valve body, bonnet and disc made of bronze, stem made of stainless steel, disc with PTFE seal. Maintenance-free stem seal due to double EPDM O-ring.
“Hydrocontrol VFN“, round flanges according to DIN EN 1092-2, PN 25 Valve body made of nodular cast iron (GGG 50 / EN-GJS-500-7 according to DIN EN 1563), bonnet and disc made of bronze, stem made of dezincification resistant brass, disc with PTFE seal. Maintenance-free stem seal due to double EPDM O-ring.
“Hydrocontrol VGC“, groove connection for couplings, PN 25 Valve body made of cast iron(GG 25 / EN-GJL-250 according to DIN EN 1561), bonnet made of nodular cast iron (GGG 40 / EN-GJS-400-15 according to DIN EN 1563), disc made of bronze, stem made of dezincification resistant brass, disc with PTFE seal. Maintenance-free stem seal due to double EPDM O-ring.

Weights

DN	Approx. weight [kg] / [lbs]
Hydrocontrol VFC/VFR/VFN	Hydrocontrol VGC
200	172 /
250	197 /
300	265 /
350	399 /
400	482 / 1063

Construction and function

Survey and functional description

The balance is achieved by a presetting with memory position. The calculated flow rate or pressure loss for each individual pipe can be preset centrally and be regulated precisely. The required values of presetting can be obtained from the flow charts. The flow charts are valid for the installation of the double regulating and commissioning valve in the supply or the return pipe provided the direction of flow conforms to the arrow on the valve body. All intermediate values are infinitely adjustable. The selected presetting can be read off two scales (basic setting longitudinal scale and fine setting peripheral scale, see illustration 7.1). The limit stop of the presetting is maintained even if the double regulating and commissioning valve is closed. The Oventrop double regulating and commissioning valves have two threaded ports which are equipped with pressure test points for measuring the differential pressure.

Markings

Details of the CE marking on the valve handwheel

CE marking
0085 Notified body (in the Pressure Equipment Directive affected dimensions)

Information on the valve body

OV: Manufacturer
DN: Nominal size
PN / Class: Nominal pressure
GJL250 / GG25; GJS500-7 / GGG50: Valve body material

Installation

Before installing the valve, the pipework has to be flushed thoroughly. Installation is possible in any position (horizontal, oblique or vertical, in ascending or descending sections). It is important to note that the direction of flow must conform to the arrow on the valve body and that the valve must be installed with L = 3 x Ø of straight pipe in the upstream side and with L = 2 x Ø in the downstream pipe. The double regulating and commissioning valve can be installed in either the supply or the return pipe. After installation, the handwheel and measuring connection must be easily accessible.

WARNING: The warning notes under paragraph 2 (safety notes) must be observed!

CAUTION

Do not use any lubricant or oil when installing the valve as these may destroy the valve seals. If necessary, all dirt particles and lubricant or oil residues must be removed from the pipework by flushing the latter.
When choosing the operating fluid, the latest technical development has to be considered (e.g. VDI 2035).
A strainer has to be installed in front of the valve.
Safeguard from external forces (e.g. impacts, or vibrations).

Once installation is completed, check all installation points for leaks.

Operation

Deaeration of the system

Before initial operation, the system has to be filled and bled with due consideration of the permissible working pressures.

Correction factors for water and glycol mixtures

The correction factors of the antifreeze liquid manufacturers have to be taken into consideration when setting the flow rate.

Presetting

The preset value of the valve is adjusted by turning the handwheel.
- The complete turns of the handwheel are shown by the outer display.
- 1/10th of a turn of the handwheel is shown by the outer display.
Remove cover plug by introducing a screwdriver in the slot and gently prising it off.
The set value of presetting can be limited by turning the inner adjustment stem clockwise until it seats. This can be done by using a 10 mm screwdriver.
Refit the cover plug.

Protecting the presetting

The sealing wire may be fitted through the hole in the handwheel and a lead seal may be fitted.