Viega MegaPress Manual De Instrucciones

Product Instructions
Viega MegaPress 3-Piece
Ball Valve Maintenance
Models 4875.9, 5975.8, 4175.8, 5175.8
1 2
7 8
EN
Viega MegaPress 3-Piece Ball
Valve Maintenance
Viega products are designed to be
installed by licensed and trained plumbing
and mechanical professionals who are
familiar with Viega products and their installation.
Installation by non-professionals may void
Viega LLC's warranty.
1
Shut off the supply line. Open the ball valve.
2
Release the flange connections. Remove the bolts.
3
Remove the middle section of the ball valve
laterally.
4
See illustration for example of separated middle
section.
5
Remove the handle.
6
Turn the ball 90° and remove from valve.
VALVE SIZE Valve Body Bolt & Nut Size
(in)
½ M8 x 55
¾ M8 x 65
1 M10 x 75
1¼ M10 x 90
1½ M10 x 100
2 M10 x 100
3
9
7
Remove the PTFE gaskets.
8
Press out the spindle from top to bottom.
CAUTION!
Check the interior components for dirt
and damage before mounting. Clean the
components if needed.
9
Swap the spindle seal. Unscrew the stem nut.
Remove the gasket with a suitable tool.
10
Replace with new gasket.
Reassemble in the reverse order of the
disassembly steps. Refer to the torque
table below for body and stem nut torque
requirements
11
Check to see that all components have been
installed after reassembly.
Bolt Torque +/- 5
ft/lbs (Nm)
M8 7.5 (10)
M8 15 (20)
M10 15 (20)
M10 22.5 (30)
M10 22.5 (30)
M10 22.5 (30)
Viega LLC
585 Interlocken Blvd.
Broomfield, CO 80021
Phone (800) 976-9819
www.viega.us
4
10
Valve Stem Nut Size Stem Nut
(mm) ft/lbs (Nm)
AF 16 7.5
AF 18 11
AF 21 11
AF 22 18.5
AF 24 18.5
AF 24 18.5
EN
Product Instructions
Viega MegaPress 3-Piece Ball Valve
Maintenance
This document is subject to updates. For the most current Viega
technical literature please visit www.viega.us.
ES
Instrucciones del producto
Mantenimiento de la válvula esférica
de 3 piezas Viega MegaPress
Este documento está sujeto a actualizaciones. Para obtener la
documentación técnica más reciente de Viega, visite www.viega.us.
FR
Instructions produit
Entretien de la vanne à bille à
3 pièces MegaPress de Viega
Le présent document est soumis à des mises à jour. Pour consulter
les manuels techniques Viega les plus récents, veuillez visiter
www.viega.us.
PI-MP 530472 0619 3-Piece Ball Valve Maintenance (EN ES FR)
5
11
Operating Conditions
■ Valves are not to be used in safety functions such
as safety loops or separating incompatible fluids.
■ Service shall be compatible with the materials of
construction. Valve selection is the responsibility of
the designer/engineer/ user to determine if the valve
is appropriate for the intended service application.
■
Dependent upon the application & the possibility of
material deterioration in service, need for periodic
inspections are the sole responsibility of the user.
■ Supports shall not be welded directly to any part of
the valve.
■ It is the responsibility of the system designer to
implement adequate protection to minimize reaction
forces and moments.
■ It is the responsibility of the designer/installer to
adhere to all applicable codes & standards.
■
Valves are not to be used as flow control devices,
use is for on-off service only (not to be used for
throttling).
■ Operating valves while exceeding the temperature
and pressure limits may result in valve failures
where chemical attack or corrosion generally
occurs gradually.
10
15
15
25
25
25
6 6