© TT Electronics plc

Issue B 7/2017

Page 2

TT Electronics | Roxspur Measurement & Control Ltd

2 Downgate Drive, Sheffield, S4 8BT, England |Ph: +44(0)114 244 2521

www.roxspur.com | sales@roxspur.com

General Note

TT Electronics reserves the right to make changes in product specification without

notice or liability. All information is subject to TT Electronics’ own data and is

considered accurate at time of going to print.

Platon Gapmeter Type SGUV &

SGUL

DS1160

STANDARD SPECIFICATION

Orifice Plate:

Impulse Pipe and

Connectors:

Isolating Valves:

Tube:

Float:

Restrictor

:

‘O’ Seals:

Housing:

Temperature Limitation:

316 Stainless Steel mounted in a steel carrier ring with blue polyester coating / all 316

Stainless Steel / all uPVC.

Copper and plated brass / 316 Stainless Steel / uPVC for integral mounting. Brass and

316 Stainless Steel fittings with 50ft - 1/2'' O.D. Nylon flexible tubing or clear soft PVC

hose for remote mounting up to 25ft.

316 Stainless Steel with PTFE head / uPVC.

Borosilicate glass with 100mm fused-in ceramic scale.

316 Stainless Steel for water, red duralumin for air, or cored plastic.

316 Stainless Steel / uPVC.

Nitrile (others available).

Die-cast aluminum with white polyester coating, black bezel and perspex window.

80°C.

35 bar hydraulic on request.

25 bar liquids, 10 bar gases, 4 bar uPVC.

±2.5% FSD.

Clamp between flanges as detailed in relevant operation manual.

Pressure Test:

Accuracy:

Instructions:

Pressure Limitation:

STANDARD FLOW RANGES

In

Mm

10-250

10-63

2.5-63

2.5-14

1 ¼

1 ½

2

2 ½

3

4

5

6

8

32

40

50

65

80

100

125

150

200

2-10

3-15

5-25

8-40

10-50

20-100

30-150

40-200

80-400

2-5

3-7.5

5-12.5

8-20

10-25

20-50

30-75

40-100

80-200

30-150

40-200

80-400

120-600

180-900

300-1500

480-2400

720-3600

1200-6000

30-75

40-100

80-200

120-300

180-450

300-750

480-1200

720-1800

1200-3000

M³/h WATER @

20˚C

M³/h AIR

@ ATP 20˚C 760 Torr

Pipe Size

Pressure Drop mbar

Pressure Drop mbar

DESIGN

Simplicity of construction is sought throughout, so that compact,

inexpensive and safe assemblies result that are, at the same time,

easy to install and to maintain.

The Main Orifice Assembly consists of an orifice plate and carrier.

The plate, normally of Stainless Steel, is always made of material

entirely resistant to the fluid to be measured and is sized and ma-

chined generally in accordance with British Standard practice de-

tailed in BS EN ISO 5167.

The carrier is made from 1†thick material (metal or plastic) and of

suitable diameter for clamping (within the bolt circle) between pipe

flanges provided by the user. Corner tappings are provided in the

carrier and are fitted with adapters to suit compression couplings

for by-pass piping.

The Gapmeter Assembly comprises a standard GU Gapmeter fitted

with a calibrated restrictor. The restrictor and indicating float are of

material entirely resistant to the fluid, standard materials are

Stainless Steel and Duralumin but alternatives are readily available.

The restrictor is of small bore and must not be obstructed other-

wise inaccuracy will result; being sited, however at the top of the

Gapmeter glass metering tube, any obstruction can be easily seen.

1. At maximum flowrate, 65% of the calculated pressure loss is

recovered.

2. The adjacent table is a useful guide to capacity, but in certain sizes

this can be increased by 20%or reduced to as little as 10% of standard.

Liquid capacity is unaffected by static pressure and is suitable for

viscosities up to 3 cP. Approximately 75% higher capacity is available

with a solid Stainless Steel float with a 5:1 range at 900 mbar maxi-

mum pressure drop. Viscosity up to 12 cP is also possible. Gas capaci-

ties relate to air discharging at atmospheric pressure. Low-pressure

calibrations for 5 mbar maximum are available. For other conditions

of temperature and pressure, special scales are available.

3. LPCB units are approved for use on sprinkler installations. See

leaflet DS1162 & DS1163.