
MU
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In many cases, the operating floor level is locate
substantially higher than the opening. In or er to be able
to operate the gate, stem extensions are necessary.
Stem gui es are use to limit the “unsupporte ” length of
the stem extension in or er to avoi any buckling failure.
The stem gui e has a HWMPE gui e to re uce friction
between the gui e an the extension.
Non-Rising St m Configuration
As stan ar , non-rising stem gate configurations are use
with self-containe frame esigns. Therefore, the stem
extension oes not support the axial loa (only torque)
an less wall brackets are require .
As a general rule, a stem gui e shoul be installe every
3 meters of unsupporte stem extension.
Rising St m Configuration
As stan ar , rising stem gate configurations are use with
open-frame esigns. Therefore, the stem extension has to
support the axial loa when the gate is operate . In
consequence, the use of stem gui es are critical to avoi
any buckling failure. As a general rule, a stem gui e
shoul be installe every 2 meters of unsupporte stem
extension.
This section briefly escribes the installation, operation an
maintenance of MU penstocks. For more etaile
information please refer to the “MU IOM Manual”.
Installation:
Orbinox MU penstocks are installe by means of Anchor
Bolts. Depen ing on the size an working con itions they
shall be either of the mechanical or chemical type (see
table below).
In or er to avoi leakage between the concrete wall an
the frame, Orbinox recommen s the use of construction
sealant equivalent to Sikaflex 11FC sealant (200ml per
meter of opening perimeter).
The minimum concrete strength shall be 20.7 MPa.
The tolerance of the concrete construction (flatness,
levelness an plumbness) shall be in accor ance to
DIN 18202.
For etaile information about type, size an quantity of
the require anchor bolts at the installation, please refer to
the notes on the “General Arrangement Drawing”.
Maint nanc and Op ration:
The Orbinox MU penstocks nee practically no
maintenance. The stem shall be kept lubricate an seals
shall be replace if amage . The MU penstock is close
by applying a clockwise rotation.
Applying too much force on the operator when closing the
gate may cause amage to the stem.
Cl ar St m Prot ctor
Handwh l
Straight Floor Stand
St m Ext nsion
St m Guid s
St m Guid & Slid Stopp r
Slid Gat
(Rising St m, Op n Fram )
B v l G ar
MU Siz
Wat r Pr ssur Standard Mounting Typ
MU BI-DIRECTIONAL
150 mm x 150 mm - 1200 mm x 1200 mm
Seating an Un-Seating
(Bi-Directional)
Wall mount:
•
Stu Type Mechanical Anchor Bolts
MU BI-DIRECTIONAL
1300 mm x 1300 mm - 2000 mm x 2000 mm
Seating an Un-Seating
(Bi-Directional) Embe e in concrete
MU UNI-DIRECTIONAL
1300 mm x 1300 mm - 2000 mm x 2000 mm
Seating (Uni-Directional) Wall mount:
•
Stu Type Mechanical Anchor Bolts
STEM EXTENSIONS
INSTALLATION, OPERATION AND MAINTENANCE
MODEL
OBX 11/12 Revision 1
MU-7