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Categories
- Test, Overhaul & Repair
- Safety Relief Valves
- Relief Valves
- Pressure Reducing Valves
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- Home
- Control Valves
- RV631 Multistep Cage Control Valves
Product Description
RV631 control valves have their main application in boiler feedwater process, They are expressly designed for processes that require low pressure drops when the flow rate is high and the need to avoid cavitation when flow rate is small. The special design of its cage, splitted in 3 steps along the travel, allows the RV631 trim to meet these process requests. During the first travel section, in which high pressure drops might generate cavitation phenomena, the process is controlled by a properly designed multistep cage, which causes the fluid to pass through six pressure reduction stages: in this way any vaporization is avoided. The last section has a final single stage cage with large flow passages which ensures the maximum flow rate with moderate pressure drop. Each section of the cage, welded together to form a solid rugged unit, is separated by lips that prevent the fluid passage between adjacent sections.
Technical characteristics
- Body
- Sizes: 3”, 4”, 6”, 8”, 10”, 12”
- Ratings: ANSI 150, 300, 600, 900, 1500
- Flanged, BW, SW
- Cast standard construction
- Face-to-face dimensions as per IEC 60534-3-2
- Flow direction: to open
- Materials: Carbon, Cr-Mo and stainless steels
Bonnet
- Bolted to body
- Same material as body
- Flow direction: to open
- Packing materials: teflon or graphite seal rings
- Materials: Carbon, Cr-Mo and stainless steels
Trim
- Balanced and fully cage-guided plug
- Unbalanced design for small ports or moderate pressure drop applications
- Plug seal rings: PTFE, metal or metal and graphite
- Flow characteristic: modified linear
Cage
- Variable resistance along the travel: 6-stages for low openings, 3-stages for intermediate travel and single-stage at full opening.
- Different arrangements of stages distribution can be performed to fulfil special applications
Seat ring
- Quick-change and free-expanding type, precisely coupled with the cage to ensure a perfect plug alignment
Leakage Class
- Classes IV, IV S1 and V according to IEC 60534-4
Actuators
- Pneumatic diaphragm or piston type
- Electric and electro-hydraulic actuators
Manufacturers Datasheet:
