Water meters SJ-80
Short Body Single Jet Water Meter, 80 mm
An 80 mm face-to-face single-jet meter for tight chambers.
- 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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80 mm between faces
30 mm shorter than the standard DN15 meter, which is the difference between an exchange and re-piping a chamber.
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Retrofit without cutting
The existing valve and union stay where they are, so the replacement is a spanner job.
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Full dial in a short body
Eight number wheels, so the shorter meter does not mean a dial that rolls over sooner.
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Dry vacuum-sealed register
The same protected register as the full-length meters in the range.
In detail
Standard DN15 meters are 110 mm between faces. This one is 80, and the 30 mm is the entire reason it exists.
Replacing a meter in an existing chamber is a length problem before it is anything else. The isolating valve, the union and the meter were installed as a set, and a replacement that is longer than the original means cutting and re-piping in a hole in the ground. A short-body meter takes up the slack instead, and the job becomes an exchange rather than an excavation.
Everything else follows the dry dial single-jet range: a vacuum-sealed register with eight number wheels, a brass body painted or nickel coated, magnetic drive, and nominal flows of 1.5 and 2.5 m³/h at DN15 and DN20. It is declared to ISO 4064:1993 in accuracy class B.
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
80 mm
130 mm
Height
72.5 mm
| Connection thread | G3/4" B G1" B |
|---|---|
| Length | 80 mm 130 mm |
| Height | 72.5 mm |
| Width | 70 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 Short Body Single Jet Water Meter, 80 mm.
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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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