OPERATING MANUAL
10-2022
3/9
1.
INTENDED USE
The Type 3500 and 3510 gate valves with ISO fitting for PE pipe are intended for potable water supply systems,
sanitary sewage systems and (if approved by the manufacturer) industrial media systems. Each valve can be
installed in above-ground and underground pipelines as an integral inline part of the piping.
The gate valves are two-position valves which can only be set fully open or fully closed, and not intended for
operation as control or damper valves.
2.
TECHNICAL DESCRIPTION
Production and acceptance according to EN 1074-2 (Valves for water supply. Fitness for purpose requirements
and appropriate verification tests. Isolating valves) and EN 12266-1 (Industrial valves. Testing of metallic
valves).
100% of each valve is leak tested.
Application temperature range: -10
°
C to +70
°
C.
Nominal diameter range: DN25 to DN50 [mm].
Armature used in water supply systems transmitting drinking water are resistant to disinfectants NaClO
or Ca (ClO)
2
containing 50 mg / l of active chlorine
Hydraulic performance: maximum medium flow rate for liquids 4 [m/s] and 30 [m/s] for gases.
Valve switching driving torque:
DN [mm]
25
32
40
50
Ilo
ść
obrotów
9
9
11
13,5
Mmax
20
25
Valve control mode: the standard version of the gate valve has the clockwise closing sense of rotation. The
closing sense of rotation can be opposite on special order.
the valve connection thread design is acc. to EN 10226-1
Nominal pressure ratings:
•
0,6 MPa,
•
1,0 MPa,
•
1,6 MPa,
TYPE 3500 and TYPE 35100 gate valves with soft seals and ISO fitting for PE pipe
feature a smooth walled
bore, a non-rising stem, and an O-ring spindle seal installed in a head-type valve cover. The stem is guided by
a bushing in the valve cover neck and a sealing plug. The stem seal is provided by the plug sealing assembly,
which is a system of O-rings. The valve is closed by a monolithic vulcanized brass wedge with thread. For
DN40 and DN50 sizes the stem is equipped with an interlocking collar installed by necking. From the bottom
the stem collar rests on a seat in the head via a bushing which acts as a sealed bearing. In case of sizes DN25
nd DN32 the stem is solid and is not fitted with a bearing in the form of a sealing bushing. The plug is secured
against unscrewing using a bayonet lock. The valve cover to body joint is made with hexagon socket head cap
screws mounted flush with the valve cover and secured with paraffin compound. The valve cover to body seal
is a rubber gasket which also seals the bolts to prevent any leaks from their openings. All inner and outer cast-
iron surfaces of the gate valve are epoxy powder coated. The stem may be operated manually using a hand
wheel or, in case of gate valves located underground, through a hood and gate valve casing, using a T socket.
