TT electronics SGUV MK.2 User manual

OPERATION & MAINTENACE MANUAL
LPCB APPROVED GAPMETER TYPE SGUV MK.2
OMM1002
© TT electronics plc
General Note
TT Electronics reserves the right to make changes in product specicaon without
noce or liability. All informaon is subject to TT Electronics’ own data and is
considered accurate at me of going to print.
Roxspur Measurement & Control LTD.—PLATON
Issue B 07/2017
TT Electronics | Roxspur Measurement & Control
2 Downgate Drive, Sheeld, South Yorkshire, S4 8BT, UK |Ph: [phone]
www.electronics.com | RoxspurSales@electronics.com
Every eort has been made during the preparaon of this document to ensure the accuracy of statements and specicaons. However, we do
not accept liability for damage, injury, loss or expense caused by errors or omissions made. We reserve the right to withdraw or amend
products or documentaon without noce.

Operaon & Maintenance Manual
OMM1002
Contents
Introducon ………………………………………………………………………………………………………………………………………. 1
Principles of Operaon………………………………………………………………………………………………………………………. 1
Materials of Construcon…………………………………………………………………………………………………………………… 1
Specicaon………………………………………………………………………………………………………………………………………. 2
Installaon…………………………………………………………………………………………………………………………………………. 3
Prior to Installaon…………………………………………………………………………………………………………………………….
Carrier Installaon……………………………………………………………………………………………………………………………..
Indicator Installaon………………………………………………………………………………………………………………………….
3
3
3
Recommended Pipeline Conguraon ……………………………………………………………………………………………… 4
Instrument Conguraon—Horizontal Pipelines ……………………………………………………………………………… 5
Instrument Conguraon—Vercal Pipelines……………………………………………………………………...……………. 6
Operaon ……..…………………………………………………………………………………………………………………………………... 7
Maintenance ……………………………………………………………………………………………………………………………………… 8
Glass Tube Cleaning or O-Ring/Glass Tube Replacement………………………………………………………………..….
Filter Cleaning or O-Ring/Filter Element Replacement…………………………………………………………………...….
By-pass Loop Air Removal …………………………………………………………………………………………………………….…..
8
8
8
Spares…………………………………………………………………………………………………………………………………………………. 9-10
Returns & Warranty…………………………………………………………………………………………………………………………… 11

Operaon & Maintenance Manual
OMM1002
Introduction
The SGUV Mk.2 is a ow meter specically designed to meet the requirement for a direct reading ow meter for use in Au-
tomac Sprinkler, Water spray or Deluge systems. It is approved for regular monitoring and tesng of such systems by the
LPCB (Loss Prevenon Cercaon Board), under their ‘Rules for Automac Sprinkler
Installaons’ (LPS1045), in the UK.
The SGUV Mk.2 provides a robust, direct reading ow meter for 50, 80, 100, 150 & 200 mm pipelines and is suitable for use
in both Horizontal & Vercal pipes, with the ow in any direcon:
• Horizontally: Le to Right
Right to Le
• Vercally: Upwards
Downwards
Full bore Isolaon valves are located in the by-pass loop, allowing meter isolaon for Filter cleaning & Tube replacement.
The inline Filter avoids clogging of the by-pass loop with any pipeline debris. In addion, a Rodding device ensures that the
secondary Restrictor Orice remains clear of any smaller parcles or algae. Bleed/Drain valves allow venng of trapped Air
or draining of the isolated Indicator by-pass loop.
Principles of Operation
The SGUV Mk.2 is a combinaon of two simple measuring elements:
1. Installed in the main pipeline is a sharp edged Orice, mounted in a Carrier ring. This assembly produces a
pressure drop proporonal to the square root of the ow.
2. Installed across the main Orice/Carrier assembly is an Indicator by-pass loop containing an accurately
calibrated Restrictor (secondary Orice). This Restrictor converts the main Orice pressure drop into ow rate, which is
directly proporonal to the main pipeline ow.
Materials of Construction
Carrier Assy Orice plate: Stainless Steel mounted in: carrier, steel, red polyester powder coated in two styles
Indicator Assy Housing: die-cast aluminum alloy, white polyester powder coated. Bezel: die-cast aluminum alloy, black
polyester powder coated. Window: Perspex
Isolaon valves; full bore brass ball valve, bright nickel plated. Rodding device: Stainless Steel. Filter ele-
ment: Stainless Steel with 1.5mm perforaons. Filter housing: TPX.
Other pipes and connectors: copper and brass, bright nickel plated.
Seals: nitrile and polyurethane. Bleed/drain valve seats: PTFE
Tube Assy Tube: Borosilicate glass with 100 mm fused in ceramic scale.
Float: Stainless Steel
Float stops: Polypropylene
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Specification
Sizes 50, 80, 100, 150 & 200 mm nominal bores
Ranges See Table 1
Mounng Either ange or grooved styles available
Flanged to suit BS10 Table “E” (also suitable for Table ‘D”) anges
Grooved to suit Victaulic®’ grooved piping system
Other manufacturers products can be used providing they conform to the Victaulic®’
Specicaon
Accuracy ±5 % at various test ows specied by LPCB (see Table 1)
Temperature Design, -30 to 80°C
Operaon, 15°C
Pressure Design, 30 bar g maximum @ 15°C, hydraulic
Operaon, 12 bar g maximum @ 20°C
Pressure Drop 65% of the orice pressure loss (354” wg) is recovered at maximum ow
Approval By LPCB to LPS1045 standard
LPCB Reference No’s 088a/05-14 (see Table 2 for Platon Ref’s)
LPCB Lisng Approved Fire & Security Products & Services
Part 5—Automac Sprinkler, Water Spray & Deluge Systems
Secon 6—Direct Reading Flow Meters
LPCB Ref NO. Nominal Pipe Size (mm) Flow Range dm3/min Test Flow dm3/min Accuracy @ Test Flows dm3/min
088a/05, 088a/10
088a/06, 088a/11
088a/07, 088a/12
088a/08, 088a/13
088a/09, 088a/14
50
80
100
150
200
150-750
300-2300
500-3500
900-8200
2500-12500
500
800
1300
1500
2200
2500
3500
4500
5000
7000
9000
±25
±40
±65
±75
±110
±125
±175
±225
±250
±350
±450
Table 1—Flow Ranges
Table 1—Flow Ranges
Flanged Carrier Ref’sGroove Carrier Ref’s
LPCB* Platon~ LPCB* Platon~
088a/05
088a/06
088a/07
088a/08
088a/09
F1/5
F1/6
F1/7
F1/7
F1/9
088a/10
088a/11
088a/12
088a/13
088a/14
F1/10
F1/11
F1/12
F1/13
F1/14
* The LPCB ref No. appears on the Carrier only
~ The Platon ref No. appears on both the Carrier and Tube
Also, the Tube & Float assemblies of aa parcular NB are universal between the 2 carrier styles and therefore, carry both Platon Ref No’s, i.e. F1/6 or F1/11
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Installation
1. Check the instrument for any transit damage. Any damage to the by-pass loop could increase resistance to ow and therefore ren-
der calibraon inaccurate.
2. Re-check that the instrument is suitable for the chosen applicaon.
3. Check that the box includes (for complete instruments only):
a) A Carrier of either Flanged or Grooved style.
b) An Indicator by-pass loop, assembled for Horizontal pipelines & Le to Right ows.
c) 2 x Tube & Float Assemblies (1x assembled in Indicator housing).
d) An impulse pipe for Vercally, Upwards ows.
e) An impulse pipe for Vercally, Downwards ows.
4. Check that the Platon Reference numbers on the Carrier and glass Tube are idencal.
i.e. F1/** (see Table 2).
5. Remove any packing materials, as necessary, from any component.
6. For best accuracy ensure that the pipeline bores are smooth and that they match that of the Carrier.
7. Select a locaon to ensure compliance with the Recommended Pipeline Conguraons (see Fig 1 & Table 3).
Carrier Installation
Flanged Style
1. The Carrier should be mounted inside the bolt circle of two anges (see Specicaon).
2. Ensure the Carrier is precisely centred in relaon to the pipeline & anges.
3. Ensure that the Gaskets (not supplies) either side of the Carrier has an Inside Diameter (I.D.) greater than or equal to the pipe nomi-
nal bore. Also ensure that when assembled no part of the gasket protrudes into the pipeline at any point.
Grooved Style
1. The Carrier should be mounted to the pipeline using two appropriately specied joints.
2. Always lubricate gasket joints, so as to avoid pinching and leakage.
Both Carrier Styles
1. Ensure the Carrier ow label matches the ow direcon of the pipeline.
2. Ensure the process connecons of the Carrier protrude from the pipeline in the correct direcon to ensure:
3. Vercal Indicator assembly.
4. Readable Viewing angle.
Indicator Installation
1. Based on the pipeline orientaon and direcon of ow, assemble the Indicator by-pass loop, using the appropriate impulse pipe.
Note the factory supplied set-up, is for Horizontal, Le to Right ows.
2. Whatever the main pipeline conguraon ensure that the Float moves freely in the glass Tube and that the indicator is accurately
Vercal.
3. Rotate the Indicator housing & glass tube, in relaon to the rest of the Indicator by-pass loop, to obtain the best viewing angle.
Table 3—Recommended Minimum Upstream & Downstream Pipe Lengths (See Fig. 1)
Carrier
Nominal Bore (mm) & Pipe Style Specicaon
50 80 100 150 200
BS1387 BS3600
L250 400 500 750 1000
D1 Flanged 38.1
D2 Grooved 89.1 98.1
Min 5 x NB
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Operation
1. Ensure that the Filter (H) is clean.
2. Check that no pipe debris is obstrucng the Restrictor by pressing the Restrictor cleaning valve (D).
3. Bleed all air from the Indicator by-pass loop before taking any ow readings.
4. Make sure that the Isolang Valves (J) are fully open before taking any ow readings.
5. Read the top edge of the Float.
6. When not in use the Isolaon Valves should be closed and the Indicator by-pass loop drained. Once the unit has been fully drained
all the Bleed/Drain Valves should then be closed.
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Maintenance
Glass Tube Cleaning or O-ring/Glass Tube Replacement (See Fig. 7)
1. Unscrew 4x screws and remove the bezel.
2. By pulling towards you, remove the plastic wedge, located at the bottom of the housing.
3. Slide the tube downwards, towards the gap created by the removal of the plastic wedge, until the bottom Insert is fully engaged in its
end connector.
4. Ensure that the top insert & end connector remain engaged together. Noting the tube & float orientation, carefully tilt the top of the
tube towards you, until it is clear of the Insert, then pull upwards.
5. If the O-rings DO NOT require replacing, then proceed to instruction 11.
6. Remove both Inserts from their end connectors by pulling, noting which Insert came from which end connector. To aid with their
removal the plastic wedge can now be used as a sliding wedge.
7. Remove 2x old O-rings from each insert.
8. Care should be taken that the new O-rings (C1 & C2) are not damaged when assembling them to the inserts.
9. Moistening the O-rings with a suitable lubricant is advisable, such that when re-assembling to the end connectors or tube the O-rings
are not damaged.
10. As previously noted, push the inserts back into the appropriate end connector, fully.
11. To replace the tube (A), reverse steps 1-4, using steps 12 & 13, for guidance.
12. To aid engagement and reduce possibility of O-ring damage, rotate the tube back & forth, whilst pushing the tube & insert together.
13. Once the tube (A) is located on the bottom Insert, use the plastic wedge on the bottom Insert as a sliding wedge to force the top
Insert & tube together.
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