Water meters SJ-BR
Brass Single Jet Water Meter
A brass single-jet meter with an eight-wheel dry register.
- 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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Survives a second fitting
A brass body takes being cut out and refitted where a plastic one cracks on the way back in.
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Eight number wheels
The dial does not roll over inside a normal service life, so consumption history stays readable.
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Frost resistant
The vacuum-sealed register survives the cold that splits a wet dial in an uninsulated box.
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Pulse output available
1 or 10 litres per pulse, fitted on request, so the meter is not a dead end for automation.
In detail
The standard-pattern brass single-jet at DN15 and DN20, 110 mm between faces and 90 mm high, with an eight-wheel dry register that will not roll over inside a normal service life.
Brass is specified here for a plain reason: it is the body a water authority will accept in a box that floods, and it is the body that survives being cut out and refitted rather than cracking on the second installation. The register is vacuum sealed and frost resistant, and the drive is magnetic, so the counter never contacts the water.
Nominal flows are 1.5 and 2.5 m³/h, the meter is rated to 16 bar, and it is declared to ISO 4064:1993 in accuracy class B. A remote transmission device can be fitted on request, with a pulse output of 1 or 10 litres per pulse.
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 | ≤50 °C (hot-water version ≤90 °C) |
|---|
Approvals
| Standards | ISO 4064:1993 |
|---|
Dimensions and installation
Length
110 mm
Height
90 mm
| Connection thread | G3/4" B G1" B |
|---|---|
| Length | 110 mm |
| Height | 90 mm |
| Width | 77 mm 80 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 Brass Single Jet 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
