Water meters SJ-D
Single Jet Dry Dial Cold Water Meter
A low-profile dry dial single-jet, 65 mm high at DN15.
- Nominal size
- DN15 DN20
- Q3 permanent flow
- 1.5 m³/h 2.5 m³/h
- Accuracy class
- Class B (ISO 4064:1993) Class B (ISO 4064:1993)
- Maximum working pressure
- 16 bar 16 bar
Overview
Why buyers choose it
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65 mm tall
Fits a box that will not close over a standard meter, which is the usual reason a meter ends up unreadable.
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No metrological compromise
The same dry, vacuum-sealed, magnetically driven register as the full-height meters.
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Pulse output available
1 or 10 litres per pulse, so a low-profile position is not a dead end for automation.
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Painted or nickel coated
Chosen for how wet the box gets, not for how the meter looks in a catalogue.
In detail
At 65 mm from the pipe centreline this is the shallowest meter in the single-jet range, and that is what it is for. Meter boxes, riser cupboards and under-sink positions are usually short of height rather than length, and a meter that will not close the lid gets installed somewhere it cannot be read.
Losing the height costs nothing metrologically: the register is dry, vacuum sealed and magnetically driven like the taller meters, with five or eight number wheels, and the brass body can be painted or nickel coated. Nominal flows are 1.5 and 2.5 m³/h at DN15 and DN20.
It is declared to ISO 4064:1993 in accuracy class B, with a pulse output of 1 or 10 litres per pulse available and a remote transmission device fitted on request.
Technical specifications
Selected size: DN15 DN20
Values shown apply to the selected size. A dash means the figure is not stated.
Metrological
| Nominal size | DN15 DN20 |
|---|---|
| Accuracy class | Class B (ISO 4064:1993) |
| Register type | Single jet, dry dial, vacuum sealed |
| Maximum permissible error, Q1 to Q2 | ±5% |
| Maximum permissible error, Q2 to Q4 | ±2% (hot-water version ±3%) |
Hydraulic
| Q3 permanent flow | 1.5 m³/h 2.5 m³/h |
|---|---|
| Q1 minimum flow | 0.03 m³/h 0.05 m³/h |
| Maximum working pressure | 16 bar |
| Q2 transitional flow | 0.12 m³/h 0.2 m³/h |
| Q4 overload flow | 3 m³/h 5 m³/h |
Materials
| Body material | Brass, painted or nickel coated |
|---|
Environmental
| Temperature class | ≤30 °C (hot-water version ≤90 °C) |
|---|
Approvals
| Standards | ISO 4064:1993 |
|---|
Dimensions and installation
Length
110 mm
130 mm
Height
65 mm
69 mm
| Connection thread | G3/4" B G1" B |
|---|---|
| Length | 110 mm 130 mm |
| Height | 65 mm 69 mm |
| Width | 78 mm |
Parts
Parts of a single-jet meter
How a meter of this type is built, and what this model is made of.
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Lid
Caps the register and keeps water and debris off the dial.
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Register
Totalises and displays the water passed.
Register type Single jet, dry dial, vacuum sealed
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Register seal
Seals the register housing against water ingress.
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Measuring chamber
Directs the single tangential jet onto the impeller.
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Impeller
Turns with the jet of water and drives the register.
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Strainer
Screens out grit and debris before the measuring element.
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Body
Houses the measuring element and carries the flow.
Body material Brass, painted or nickel coated
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Tailpieces / connections
Threaded couplings that join the meter to the pipework.
Connection thread G3/4" B G1" B
Download centre
Everything you need to specify.
Documents for the Single Jet Dry Dial Cold Water Meter.
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Download PDF (Opens in a new tab) Download PDF (Opens in a new tab)
Technical datasheet
Specifications and dimensions for DN15.
Specifications and dimensions for DN20.
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Download PDF (Opens in a new tab)
All sizes datasheet
Every size in one sheet.
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Multi Jet Dry Dial Water Meter, Class B
- Sizes
- DN15–DN50
- Q3 permanent flow
- 1.5 m³/h at DN15