Scope Of Manual; Intended Use; Product Identification - Flowserve Valtek FlowTop V726 User Instructions

Valtek FlowTop

1 Scope of Manual

The following user information covers the Valtek FlowTop
general service control valve:
• DIN Units - PN 10 - 40, DN 15 - 400 - Type V726
• English ASME Units - Class 150, NPS ½ - 16 - Type V738
• English ASME Units - Class 300, NPS ½ - 16 - Type V740
• DIN Units - PN 10 - 40, DN 15 - 150 - Type D726
• English ASME Units - Class 150, NPS ½ - 6 - Type D738
• English ASME Units - Class 300, NPS ½ - 6 - Type D740
• Assembled with a pneumatic actuator
• Comes with or without ancillary equipment
• As an option an electric rotary actuator can be installed

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 noise level emitted by control valves is always determined
by the operating data and the installation situation and is dif-
ferent for each application. There is no general typical value
for this. In any case, technical measures are used to try to
keep this below 80 dB(A). The individually expected pre-calcu-
lation noise level can be found in the calculation data sheets.
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 DN 65
- 400 respectively NPS size 3 to 16.
The Valtek FlowTop consists of the body, bonnet, trim, and ac-
tuator. The valve is designed with a high level of interchange-
ability allowing the user to assemble the greatest possible
number of variations from a minimum number of components
to match each application. There are ten bonnet designs: stan-
dard 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
FCD VLEEIMFTOP-03 (EN/A4) June 2023
1349:2009 - Industrial Process Control Valves (DIN EN 1349
and VDE 0409-1349).
The Valtek FlowTop is designed for use in MODERATE and
WORLDWIDE environmental conditions. However, the inten-
ded use of the pneumatic actuators and the accessories is
limited by their permissible ambient temperature application
limits. When operated in the moderate range, a service life
of 7 to 10 years can be expected before servicing. Leaks can
occur at low temperatures (-60°C to -25°C), at high tempera-
tures permanent damage to the elastomers (+60°C to +80°C,
expected service life then < 1 year). Humidity up to 93% non-
condensing, air pollution up to 300 µg/m
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 (V726 and V738, V740) control valve
comes with an attached serial plate which includes key infor-
mation specifically for each control valve:
Figure 3: Serial Plate (WW-design, WorldWide)
Kennzeichnung
Tag.No.
Fabrikations Nr.
R
Serial No.
Made in Villach - Austria
Typ
Gehaeuse / Atteste
DN PN/Class
Type Body / Certificate
Betriebstemperatur Kennlinie / Hub
max.
Working Temperature Characteristic / Stroke
Betriebsdruck fuer Antrieb
dp
max.
Working Pressure for Actuator
Umgebungstemperatur
min. max.
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.
unless restricted by
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Druecke sind Ueberdruecke
Pressures are gauge pressures
Kegel Sitz Innenteile Antrieb
Kvs / Cv
Plug Seat Trim Actuator
Zuluft
min. / max.
Supply
Federlaufbereich
Spring Range
Sicherheitsstellung
Einbaulage
< 30°
Arrangement Failure Position
Besonderheiten
Specialities
flowserve.com
S
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