Type 3241-7 with forged steel valve body

SAMSON control valves
Series 240, 250 and 280 Control Valves include pneumatic
and electric globe valves, three-way valves, and angle valves.
Their application range covers control tasks in process engineering
and industrial applications as well as in supply and
power plant engineering. The modular system allows easy
retrofitting and servicing.
The control valves consist of the valve and the actuator. They
can be equipped with pneumatic, electric, electrohydraulic, or
hand-operated actuators. For controlling purposes and travel
indication, accessories such as positioners, limit switches and
solenoid valves can either be attached directly (see page 21
and Information Sheet T 8350 EN) or according to
IEC 60534-6 (NAMUR rib).
The valve bodies are available in cast iron, spheroidal graphite
iron, cast steel, cast stainless or cold-resisting steel, forged steel
or forged stainless steel as well as in special materials. All parts
of the valve and the pneumatic actuator housing in the completely
corrosion-resistant version are made of stainless steel.
Refer to the associated data sheets for details.
Series 240
Series 240 Control Valves are available in nominal sizes ranging
from DN 15 to DN 300 (NPS ½ to 12) and up to a nominal
pressure PN 40 (Class 300).
Control valves in the standard version are suitable for temperature
ranges between 10 and +220 °C (15 and 430 °F). An insulating
section allows the temperature range to be extended to
200 and +450 °C (325 and +840 °F).
The plug stem is sealed either by a self-adjusting PTFE V-ring
packing or an adjustable packing. To meet stricter emissions
control requirements, a stainless steel bellows is used.
The Type 3241 Control Valve can be equipped with a heating
jacket that may also include the bellows.
Series 250
Series 250 Control Valves are used when large nominal sizes
and/or high pressures are involved in process engineering,
power plant or supply engineering.
In addition to globe, three-way and angle valves, four-flanged
valve bodies with bottom plug stem guides, and valves with axial
multi-stage throttling plugs, customized valve constructions
to meet customer specifications can be engineered as well.
The valves are manufactured in nominal sizes from DN 15 to
DN 500 (NPS ½ to 16) and for nominal pressures between PN
16 and PN 400 (Class 150 to 2500).
The standard versions of these control valves are suitable for
temperatures ranges between 10 and +220 °C (15 and
430 °F). This temperature range can, however, be extended by
using an adjustable high-temperature packing to a temperature
range between 10 and +350 °C (15 and 660 °F) and by using
a bellows seal or an insulating section to a temperature range
between 200 and +500 °C (325 and +930 °F).
Welland & Tuxhorn valves
The Type RVG Pneumatic Control Valve from Welland &
Tuxhorn is used in power plants and in the petrochemical industry
to control feedwater and other liquids. The valves are manufactured
with globe-pattern and angle-pattern bodies in nominal
sizes DN 25 to DN 150 (NPS 1 to 6) with nominal pressures
PN 16 to PN 400 (ANSI Class 150 to 2500).
Series 280 and W&T
Series 280 Steam-converting Valves are used to reduce both the
steam pressure and steam temperature to optimize plant operation
and heat efficiency in process plants, for example, in refineries,
food and beverage, tobacco or pulp and paper industries.
Steam-converting valves are based on Series 250 Valves fitted
with a flow divider St III and an additional spray water connection.
They are available in nominal sizes ranging from DN 50
to DN 400 (NPS 1 to 16), with nominal pressures of PN 16 to
PN 400 (Class 150 to 2500) and for temperatures up to
500 °C (930 °F).
The Type DUV-C3 Steam-converting Valve from Welland &
Tuxhorn is designed for high-pressure ranges and can be engineered
with varying inlet and outlet sizes. The inlet nominal
sizes range from DN 80 to DN 500 and the outlet nominal sizes
from DN 100 to DN 1600.
Large amounts of spray water can be injected thanks to the integrated
atomizing steam cooler. The valve can be operated in a
wide load range.
Valves for special applications
These valves have been developed for special requirements including
cryogenic valves, valves for food processing, diaphragm
control valves and micro-flow control valves.
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