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Sempell Model 142 High Pressure Water Control Valve

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Henna Ketoja
Inside Sales Engineer
Mob. 400 612 124

Risto Wallin
Country Manager Askalon Finland, Key Account Manager Nuclear
Phone. 0207 416 209
Mob. 0400 448 248

Specially designed low-maintenance control valves for a wide range of applications in water circulation.
Sempell™ series 142 designer angular water control valves for the following applications:
• Water injection at HP/IP Bypass.
• Feedwater Start-up Control valve.
• Minimum Flow valve at Feedwater pumps.
• Blow-down valve at drum boilers.
The narrowly scaled Cv values-series and a large control ratio allow an exact adjustment for the respective task. The trims can be easily changed. A huge combination of material choices and multi pressure reduction stages.

Tekniset tiedot
Ominaisuudet

Size	DN 65 to DN 400 / NPS 1 to 10
Pressure class	Class 3000
Pressure	Up to 480 bar, Up to Class 2800
Temperature	-29 °C to 400 °C, -20 °F to 750 °F
Body material	A105, A182 F12 / A182 F22 special design
Trim material	Stem 1.4057 / 1.4122 (17% Cr steel) Cages 1.4057 / 1.4122 (17% Cr steel) Seat ring 1.4057 / 1.4122 (17% Cr steel)
Stem sealing	PTFE (up to 480°F), pure graphite
Plug design	A–type – parabolic Flow To Close (FTC) L–type – multistage Flow To Close (FTC) X–type – single stage Flow To Open (FTO)
Characteristic	Equal percent (square, linear on request)
Control ratio	Standard 1:40
Sealing seat/plug	Metallic
Connection	Butt weld ends acc. to ASME B16.25 or ISO 9692-1
Leakage class	ANSI / FCI 70–2 class V DIN EN 12266–2 class B

Modular design.
The valve is suitable for continuous operation.
Good adjustment to the task by narrowly staged Cv–value–series and large control ratio.
Trims can be changed easily while valve is welded into pipe.
Different plug types available.
Minimized wear and tear through separation of sealing and control area at high Δp.
Different actuator types can be used.
With low–friction PTFE packing at design temperatures ≤ 480°F.
Resistant for standard pickling process.
The stem nut can be re–lubricated during operation.
Thermal expansion by high temperature differences at stem will be balanced by cup spring in yoke head.

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Sempell Model 142 High Pressure Water Control Valve

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