SUL Pump protection valve for centrifugal pumps
The SUL valve design is a further development of the SCHROEDAHL SU valve, an automatic recirculation valve that has been used in ships since 1960.
In addition to the well-known TD series, the SUL series offers effective and cost-effective protection for pumps used in the energy, chemical and petrochemical industries.
The SUL consists of two housing parts (items 01, 02) made of cast steel or stainless steel, a non- return check-valve (item 07) with guide (item 04) and closing spring (item 06) as well as the bypass- inserts (items 10-13) and the damping device (items 14, 15).
Based on long series of tests and operating experience, these parts are matched to each other in such a way that stable operation is guaranteed, even with a slight tendency for the system to vibrate.
The automatic bypass section comprises the vortex bushing (item 10), in which a bushing/stem assembly (item 11/12) follows the movement of the non-return valve plug and the adjustment bolt (item 13).
General information
Product features
- Automatically modulating bypass function
- Cast material, carbon steel, stainless steel
- Single-stage pressure reduction (up to 20 bar)
- Internal operation (no external energy source required)
- Easy to install
- Low maintenance
- Suitable for all liquids
Special features
- Reliable operation with only a few moving parts
- Easy to install – in a vertical or horizontal position, directly on the pump outlet
- Easy to change flow characteristics (change of one part - item 13 - only).
- Can be used for a wide range of liquids such as water, oil, hydrocarbons, liquid gas and many other types of chemical media.
- Temperature range -200 °C to +230 °C
Technical data
Nominal diameter: DN 25 – 250 / NPS 1 - 10
Pressure class: PN 10 – 63 / Class 150 – 300
Temperature (max.):Up to 230 °C / 446 °F (other temperatures on request)
Housing material: 1.0619 / A216WCB
1.4408 / A351CF8M
1.4410 / A9955A
1.4501 / A9956A
Housing type: Cast
Media: Liquids of all kinds
(water, oils, chemicals and others)
Flanges : EN 1092-1, ASME B16.5, ISO 7005, JIS, JPI
Designs: vertical installation, horizontal installation, drain hole, optional non-return, design for particles (with wiper)
Number of stages (max.): 1
Number of controlled stages (max.): 1
Operating range (max.) : Delta p up to max. 20 bar (water)
Installation information
SUL valves should be installed as close as possible to the pump, preferably at the discharge port of the pump, in a vertical position. Horizontal installation is also possible.
The distance between valve inlet and pump outlet should not exceed 3m to prevent pressure pulsations caused by the elasticity of the medium.
Ensure that the drain screw (if provided) is at the bottom of the valve in case of horizontal installation
Data
Design Standard
Unit
Temp
Pressure Rating
Nominal size
Housing
Stages
Other data
Images
Files
Contact
Schroedahl Customer Care
SCHROEDAHL GmbH
- A subsidiary of Circor International -
Alte Schönenbacher Str. 4
51580 Reichshof-Mittelagger
Germany
Phone +49 2265 9927-0
Fax +49 2265 9927-947
schroedahl@circor.com