Page 162 - Catalogue 2019

9
QUAD-RING Seal
Description
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Original QUAD-RING Seals are four lipped seals with a
specially developed sealing profile.
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QUAD-RING Seals are self energizing double-acting
sealing elements. The forces acting in radial or axial
A wide range of elastomer materials for both standard
direction due to the installation give QUAD-RING Seal its
and special applications allows practically all liquid and Method of Operation 9
gaseous media to be sealed. initial leak-tightness (initial squeeze). These forces are
BUTTERFLY VALVE Q 011 BUTTERFLY VALVE Q 011
superimposed by the system pressure.
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QUAD-RING Seals are vulcanized as a continuous ring.
They are characterized by their annular form with a four An overall sealing force is created which increases with
lipped profile. Their dimensions are specified with the
TECHNICAL DATA TORQUE DN increasing system pressure (Figure 2). Under pressure, the
Size
80 seal behaves in a similar way to a fluid with high viscosity
(Md) are based on dry media 1).
inside diameter d and the cross-section W (Figure 3 15
Nominal diameter: DN 80 - DN 400 - The torque values specifi ed [mm] [in] Md
1
20
4
Face-to-face: EBRO works standard and are measured with air at 100 and the pressure is transmitted uniformly to all sides.
a temperature of 20 °C
5
125
25
Flange accomodation: EN 12220 - The values specifi ed are based 150 6 30
EN 24154 on the initial breakaway torque 200 8 35
(disc disengages from seat, 250 10 40
Top fl ange: EN ISO 5211 torque then drops) 280 11 45
300 12 50
Marking: EN 19 Regarding the dimensioning of
actuators, please contact our 350 14 55
Tightness check: EN 12266 (Leakage rate A) engineers. 400 16 60
W
d1 All values in Nm
Temperature range: 0°C to +50°C
Operating pressure: max. 1 bar
W

High grade double block butterfl y valve, with test/lubrication port for
laboratory, clean room and pharmaceutical applications. 9
Figure 1 QUAD-RING Seal dimensioning
DOUBLE FUNCTION
Wafer type butterfl y valve in eccentric construction with a
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„Double Block and Bleed“ sealing design.
QUAD-RING Seals are supplied in dependence on the
A cavity space between the sealing lips is pressurized or de-
FEATURES American O-Ring Standard AS 568 B.pressurized thru the test port. An air test gauge is connec-
ted to the port and displays even little leakages by a pres-
- Can be installed in any desired position sure surge or drop. The volume of the hollow space is very
- Multiple shaft bearings small. Therefore it is possible to make visible lowest leakages
- Can be disassembled, material-specifi c recycling possible Advantages under pressure.
The exact position of the closed valve is controlled by a me-
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chanical stop. Even after many
In contrast to the O-Ring, QUAD-RING Seal has the Open/Close cycles, exact
repeatability of the closed position will be observed.
following advantages:

GENERAL APPLICATIONS IN HVAC PLANTS: - -- - Avoids twisting in the groove. Due to its special profile,
- Pharmaceutical industry the seal does not tend to roll in the groove during The sealing is similar to a quadratic ring. A large range of
rubber compounds are available, which ensures the use in various
- Clean room technology reciprocating movement. applications of ventilation technology.
- Research laboratories The low torque of the Q 011 requires minor actuator power and
- Laboratories therefore guarantees an energy-effi cient automation of the valve.
- -- - Low friction.
Pressure
- -- - Very good sealing efficiency. Due to an improved
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pressure profile over QUAD-RING Seal cross-section,
a high sealing effect is achieved.
The integrated coupling provides the port for the air test gauge and
the lubrication press.
- -- - A lubricant reservoir formed between the sealing lips
improves start up. www.ebro-armaturen.com

Q 011 an O-Ring, the mould line flash lies in the trough,
- -- - Unlike 4.10 post@ebro-armaturen.com
01.2019
between and away from the critical sealing lips.
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Figure 2 QUAD-RING Seal squeeze with and
without system pressure

Latest information available at www.tss.trelleborg.com

Edition July 2007
2