Scope Of Manual; Intended Use; Product Identification; Valtek Flowtop Modification - Flowserve Valtek FlowTop V746 User Instructions

1 Scope of Manual

The following user information covers the Valtek FlowTop
general service control valve:
• English ASME Units - Class 150, NPS ½ - 6 - Type V746
• English ASME Units - Class 300, NPS ½ - 6 - Type V748
• Assembled with a pneumatic actuator
• Comes with or without ancillary equipment

2 Intended Use

Control valves are pressure ves-
WARNING
sels designed and rated for spe-
cific application conditions. Before installation, check the
serial number and / or the tag number to ensure that the
valve and actuator being installed are correct for the in-
tended application. Do not use the valve outside of its rated
design limits. Exceeding the design limits may cause haz-
ardous conditions including leakage of the process media
or rupture of the pressure boundary resulting in possible
process loss, equipment or environmental damage, or seri-
ous personal injury or death.
The specific product design data can be found on the valve's
serial plate, data sheet and the calculation sheet (in acc. to the
IEC 60534-7:2010).
The Valtek FlowTop handles a wide variety of general service
applications, while offering high flow capacity. All sizes come
standard with unbalanced trim; for high pressure drop appli-
cations optional pressure balanced trim is available for NPS
size 3 to 6.
The Valtek FlowTop consists of the body, bonnet, trim,
and actuator. The valve is designed with a high level of in-
terchangeability allowing the user to assemble the greatest
possible number of variations from a minimum number of
components to match each application. There are five bon-
net designs: standard bonnet or extended bonnet (either as
unbalanced or pressure balanced), and bellows seal bonnets.
See Figure 1 and Figure 2.
The Valtek FlowTop is designed in compliance with EN
1349:2009 - Industrial Process Control Valves (DIN EN 1349
and VDE 0409-1349).
The Valtek FlowTop is designed for use in MODERATE and
Valtek FlowTop General Service Valve
WORLDWIDE environmental conditions, ambient tempera-
ture range -40°F to 180°F (-40°C to +82°C), air humidity up
to 93% non-condensing, air pollution up to 300 µg/m
restricted by the accessories.
The product offering may include optional ancillary equip-
ment, such as positioners, air-filter regulators, solenoid
valves, limit switches or boosters. Digital, I/P, or pneumatic
positioners can be mounted directly, with a mounting bracket
or according to NAMUR standards. Refer to the relevant man-
ufacturer's user instructions for information regarding other
ancillary equipment.

3 Product Identification

Each Valtek FlowTop (V746 and V748) control valve comes
with an attached serial plate which includes key information
specifically for each control valve:
Figure 3: Serial Plate (WW-design, WorldWide)
Made in Villach - Austria
Typ
DN PN/Class
Type
Betriebstemperatur
max.
Working Temperature
Betriebsdruck
max.
Working Pressure
Umgebungstemperatur
min.
Ambient Temperature
Figure 4: Serial Plate (EU-design, European Union)
The same serial number shown on the plate will appear on
all Valtek FlowTop data sheets, dimensional drawings, bills
of material, and spare parts lists. Other information located
on the serial plate is self-explanatory for the Valtek FlowTop
control valve.
You can download .pdf versions of the Valtek FlowTop docu-
mentation including a technical bulletin and user instructions
at www.flowserve.com. It is the user's responsibility to keep
this and related documentation on file and accessible for the
Valtek FlowTop product.

4 Valtek FlowTop Modification

Valtek FlowTop control valves are generally delivered as tested
and assembled units, with factory-mounted actuators.
FCD VLENIM8610A4 11/18
Kennzeichnung
Tag.No.
Fabrikations Nr.
R
Serial No.
Gehaeuse / Atteste Kegel Sitz Innenteile
Kvs / Cv
Body / Certificate Plug Seat
Kennlinie / Hub Zuluft
Characteristic / Stroke Supply
fuer Antrieb Federlaufbereich
dp
for Actuator Spring Range
Einbaulage Sicherheitsstellung
max.
< 30°
Arrangement Failure Position
Besonderheiten
Specialities
flowserve.com
, unless
3
Druecke sind Ueberdruecke
Pressures are gauge pressures
Antrieb
S
Trim Actuator
min. / max.
3