JET Range K11320 9515 DZR Commissioning Valve Set Installation Guide
- June 4, 2024
- JET RANGE
Table of Contents
JET Range K11320 9515 DZR Commissioning Valve Set
Wolseley UK Harrison Way Royal Leamington Spa CV31 3HHTel : 01765 690690
How to use the JET 9515 Commissioning Set (Installation, Operating and Maintenance Instructions)
GENERAL INFORMATION
JET 9515 valves are designed to be installed on heating and cooling systems. They allow a correct balance between the different branches of a hydraulic heating/cooling system to be obtained. These valves can be used to;
- – Regulate the flow, by modifying the position of the throttling disk, through rotating the handwheel (there are 40 different positions, as shown by the figures on the handwheel).
- Stop the flow at any time and, when reopened, to recover the same previous setting of the handwheel by using the “Memory Stop” function (see VALVE SETTING paragraph).
Evaluate the flow passing through the valve by measuring the differential pressure between the test points, using the fixed orifice Kvs value, which is constant and independent from the handwheel’s position (see graph 1 on page 3).
JET 9515 valves are intended to be used for non hazardous liquids only. These include liquids in the Group 2 fluid classification as defined by the Pressure Equipment Directive (Dir. 2014/68/EU). This, together with the Pressure/Temperature rating shown overleaf (Table 1), places the JET 9515 valves in the SEP category, for which the CE logo is not required.
PRESSURE AND TEMPERATURE RATINGS
| Non-shock pressure at temp. range | Non-shock pressure at maximum temp. |
|---|---|
| 25 bar from -10°C (*) to 110°C | 20 bar from 110°C to 130°C (**) |
- = Only for below zero water temperatures where antifreeze fluids have been added.
- = Only for water temperatures over 100°C where anti – boiling fluids have been added.
The operative conditions shown above are intended for non-shock operating
conditions: water hammer, impacts, stress loads, corrosive or erosive external
environmental elements and fluids with abrasive properties should be avoided.
INSTALLATION
- JET 9515 valves ½” and ¾” have threaded female end connections (ISO 228/1).
- JET 9515 valves from 1” to 2” have threaded female end connections (ISO 7/1 Rp).
It is important that the flow direction matches the direction of the arrow indicated on the body of the valve. In order to obtain the best flow measurement accuracy, it is advisable to install the JET 9515 valve as follows;
- Using pipework of the same nominal size as the valve;
- With a minimum straight pipe length (equal to 5x Pipework Diameter) at the inlet (10x when installed at the outlet of a pump) and a length of 2x Pipework Diameter at the outlet.
- Avoid using any material to connect the pipes that may obstruct part of the flow around the valve. Please ensure there are no burrs present on the pipe ends themselves that protrude inside the bore and obstruct part of the flow (it’s advisable to flush the system before installation or after subsequent maintenance on the system).The valves should be installed in such a way so that the pipeline does not subject the valve to any torsion, bending or tension. During the installation please ensure to leave sufficient space around the test points in order to allow enough room to connect the manometer probe.
VALVE SETTING
Preregulation is achieved by turning the handwheel along its four turn stroke until one reaches the desired flowrate, derived from the differential pressure signal measured at the two test points (see flow chart (Graph 1) above). Versions for low flows are identified by a letter marked on the body, next to the nominal diameter indication (L for low flows, U for very low flows). The current presetting of the valve can be read on the graded scale of the handwheel with the accuracy of one tenth of a turn (double zero indicates that the valve is closed).
MAINTAINING THE REQUIRED VALVE SETTING
Once the required flowrate has been reached, it is possible to set the Memory Stop device as follows:
- With a small tool gently remove the plastic cap at the center of the handwheel;
- Insert the hexagonal 3mm Allen key (provided) into the central bore and, leaving the handwheel in its desired position, tighten the inner screw clockwise until it stops (do not over-wrench).
- Replace the plastic cap. It is possible to prevent tampering by sealing the cap to the upper part of the handwheel using a specific wire with lead seals threaded through the pre-existing slots.
Now the valve may be closed, thus interrupting the flow, at any time. When re- opened, the Memory Stop is guaranteed to return to the previous setting.
VALVE TAG
JET 9515 valves are supplied with a data tag indicating:
- the Fig. Number of the valve type;
- the nominal size;
- the value of the flow coefficient Kvs:
On the tag there is sufficient room to write the required setting of the valve, indicating either the handwheel setting figures, the desired flowrate or the pressure signal. The tag can be fixed to the handwheel with the provided plastic tie. By keeping the tie long, it is possible to leave the tag on the outside of any thermal insulation, thus simplifying the identification of the insulated valve.
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