www.prevost.eu General Catalogue 188 pvr range www.atila.com.pt PVR CONCEITO / FITTINGS, ACESSORIOS E PVR TUBOS Construa as suas redes de ar comprimido facilmente Instalação duradoura Material termoplástico inalterável Compatível com óleos de compressor Rápido e fácil de usar CONCEITO PARA REDES AR COMPRIMIDO
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www.prevost.euGeneral Catalogue 188
pvr rangewww.atila.com.pt
PVR CONCEITO / FITTINGS, ACESSÓÓORIOSE PVR TUBOS
Construa as suas redes de ar comprimido facilmente
> The main network must be a loop, equipped with fixed points and expansion bends.
> The main pipe should be large enough to cater for future extensions and avoid pressure drops.
> The main pipe must be fixed at a slight incline in order to drain condensates to low points (bleeds).
> Pressurisation, test at 10 bar:
- 10 min after fitting for pipe dia. 20 to 63 mm,
- 60 min after fitting for pipe dia. 90 mm.
We recommend waiting 12 hours before final pressurisation, depending on the installation conditions (temperature 20°C, ambient humidity).
BASIC NETWORK INSTALLATION RULES
MATERIAL
Composite PVC and resilient materials forming a ductile, inalterable product.
FLUID TRANSPORTEDCompressed air.
RESISTANT Fire resistant, self-extinguishing material, does not propagate flames.
UV-resistant: the PVR system is not sensitive to light. However, if it is exposed facing a window or used outdoors, it should be protected with a UV screen.
Impact resistance (in accordance with standard EN ISO 180). Admissible temperatures: -20°C to +50°C.
RELIABLE Inalterable material, no maintenance required. Compatible with compressor oils. No contamination of air from the pipe.
INSTALLATION Install the network by assembling pipes and couplings by cold welding.The wide range of available couplings and accessories enables the network to be adapted to the workshop configuration.The installation cost is reduced.
COLOUR The PVR system is coloured with a blue pigment in the material.The colour complies with standard NFX 08-100.
PRESSURE
Pipe dia. 20 to 90 mm PN 13 bar at 23°C PN 7 bar at 50°C
PLANS AND ESTIMATES ON REQUEST for your proposed installation
TECHNICAL MANUAL and ASSEMBLY INSTRUCTION available on request
The desired flow rate (max. pressure drop 5% relative to inlet pressure)
Required length of main pipe
DEFINE THE PIPE DIAMETER ACCORDING TO THE FLOW RAT
EXPANSION LOOP LENGTH Calculation as a function of overall expansion (DL)
and pipe diameter
EXPANSION AS A FUNCTION OF TEMPERATURE
To compensate for expansion or contraction phenomena due to temperature variations, the PVR network must be fitted with absorption mechanisms. These mechanisms must be supported on sliding brackets. The network expands when the operating temperature rises and contracts when it falls.
These variations are measured based on the expansion coefficient: Expansion coefficient: 0.075 mm per metre and per degree.
Expansion is calculated as follows:
EXPANSION LOOPS
Ø 32 mmØ 25 mm
Ø 20 mm
Ø 90 mm
Ø 40 mm
Ø 63 mm
Ø 50 mm
B = Length of loop: 1 m (see table below)DL = pipe expansion: 40 mm
C = expansion coefficientL = length of straight line in m
(between two fixed point∆T° = difference between installation tempera-
ture and operating temperature, in °C.DL = overall expansionWhere DL = C x L x∆T°
EXAMPLE : a 20-metre line of 50 mm pipe, installed at an ambient temperature of 15°C and subjected to a maximum temperature of 40°CGiving ∆T° : 25° C difference between installation and operation Or DL: 0,075 x 20 (m) x 25 (40°C - 15°C°) = 37 mm
Ø 20 Ø 25 Ø 32 Ø 40 Ø 50 Ø 63 Ø 90
10 mm 25 cm 30 cm 35 cm 40 cm 45 cm 50 cm 60 cm
20 mm 35 cm 40 cm 45 cm 50 cm 60 cm 65 cm 85 cm
30 mm 45 cm 50 cm 55 cm 70 cm 80 cm 90 cm 125 cm
40 mm 50 cm 60 cm 70 cm 85 cm 100 cm 115 cm 155 cm
50 mm 65 cm 70 cm 85 cm 100 cm 120 cm 140 cm 190 cm
WALL MOUNTING Pipe installed with sliding M8 clamps, anchored directly to the wall. To be located as close as possible to the coupling (maximum 20 cm). Clamps Ref. AVRCI Screw Ref. PV 80
CEILING MOUNTING Pipe installed with sliding clamps, held by a threaded stud anchored to the metal framework (IPN) by appropriate clips. Mounting clips depending on framework thickness: Ref. CP 38, Ref. CP 1420 or Ref. CP 016 + M8 studs Ref. TF M8100
PLINTH MOUNTING Pipe installed with sliding clamps, fixed to a metal plinth to install the network, avoiding obstacles. Bracket: Ref. CS 180L - Ref. CS 310L Ref. CS 420L - Ref. CS 500L
SELECTING MOUNTING METHODS DEPENDINGON THE ENVIRONMENT
DRYING TIME
Glue drying time varies depending on the ambient temperature and humidity.
To guarantee bonding strength when pressurised, allow the following times:
COLD WELDINGDAssembly by cold welding melts the assembled parts.
B = Length of loop: 1 m (see table below)DL = pipe expansion: 40 mm
CUTPipes must be cut straight. Use a metal saw and mitre box, or preferably a pipe cut-ter ref. PVR CTU.
DEBURRCHAMFERAfter cutting a pipe, deburr the inside. To ensure that the glue is distributed uniformly, cut a chamfer on the exterior of the pipe (half the thickness of the pipe). Chamfer tool: ref. PVR CHE.
CLEANDegrease the exterior of the pipe and the interior of the union to eliminate all traces of grease. This ensures a perfect weld. Degrease using a cloth soaked in cleaner ref. PVR DEC.To visualise the length of pipe to be cleaned and glued, draw a line on the pipe at the length to be inserted.
GLUEUse the melting product «PVR COL» Temp.: + 5 to +25°CApply the product to the part of the pipe to be inserted, as two thin crossed coats, with the second applied length-wise, then inside the join using the brush supplied in the cap.
INSERTImmediately after applying the glue, insert the parts into each other fully, push-ing lengthwise but without rotating.
OD Number of bonding operations Number of stripping operations 250 ml tub 500 ml tub 1,000 ml tub 500 ml tub