Rising Stem Ball Valve (RSBV) by Control Seal

RISING STEM BALL VALVES (RSBV)

Control Seal non-contact Rising Stem Ball Valves have a single-seat non-friction design that is able to operate and has proven an exceptional long life span under extreme conditions.

SIZE: 1” ~ 36” (DN25 ~ DN900)

BORE: Reduced or Full (Full is piggable)

PRESSURE: 150# ~ 2500# (PN20 ~ PN420)

TEMPERATURE RANGE: -196°C ~ 538°C

CONNECTIONS: Wide choice on request

MATERIALS: Wide choice on request

Non-contact Rising Stem Ball Valve (RSBV) is designed to avoid issues of trunnion mounted, floating ball and other conventional valve types under the following extreme conditions:

HIGH / LOW TEMPERATURE AND TEMPERATURE FLUCTUATION

HIGH PRESSURE / HIGH DIFFERENTIAL PRESSURE

MEDIA WITH SOLID PARTICLES

FREQUENT SWITCHING

(ESD) EMERGENCY SHUTDOWN / FAST STROKE

Its HIGH PERFORMANCE in extreme conditions is secured by the following characteristics:

SINGLE SEAT DESIGN resulting in no adverse effect from thermal expansion.

METAL TO METAL SEALING. No weak parts (such as springs) are required in order to obtain perfect sealing. Sealing is obtained mechanically - independent on line pressure.

FRICTION-FREE OPENING AND CLOSING. The Rising Stem Ball Valve sealing mechanism is based upon axial movement only, compared to standard Ball, Gate, Plug and butterfly valves having their sealing mechanism based upon shear force, friction and tearing. The Rising Stem Ball Valve sealing is not liable to friction or tearing as there is no contact between ball and seat during rotation of the ball. This friction free quarter turn mechanically energised sealing means no abrasion on the seal and, compared with other types of valves, an exceptional long life with up to zero leakage during the whole life.

SELF-CLEANING sealing surfaces due to high velocity flow during opening and closing.

LINEAR STEM MOVEMENT ONLY resulting in strong and controlled opening and closing „1 inch per 1 second“.

THE SELF-LOCKING OPERATING MECHANISM on all Control Seal valves secures the closing member from rotating due to in-line forces. As a result there is no danger of line slam or shock.

IN-LINE MAINTENANCE AND SERVICE. Top-access for stem packing renewal is possible while the valve is in-line and top of the valve is closed by back seat. TOP ENTRY for easy service and possibility to exchange all internals including seat while the valve is in-line.

APPLICATIONS

Molecular Sieve / LNG Dehydration units / Gas drying

Hydrocracking units / Hydrogen service

Petrochemical - wide range of applications

Hot oil

Steam service

USED AS

Isolation valve

Frequent switching valve

Blow-down valve

General shutdown valve

Emergency shutdown valve

(Abreviations / tag numbers: KV, MOV, BDV, ESD, XV and more)

Control Seal delivered over 10,000 Rising Stem Ball Valves, in 600 projects, into 50 countries worldwide.

Control Seal has a UNIQUE DESIGN OF ITS PRODUCTS, SHORT LEAD TIME, COMPETITIVE PRICING AND EXCELLENT AFER-SALES SUPPORT.

Control Seal RSBV features HELIXSTEM® rotating mechanism, see benefits of the unique design below:

FAST OPENING AND CLOSING due to a very strong rotating mechanism.

The valve is MAINTENANCE FRIENDLY as the rotating mechanism is inside the valve. Furthermore, stemguides and gland packings are outside the pressurized area.

ENVIRONMENTAL FRIENDLY - LESS FUGITIVE EMMISSIONS AND LESS STRESS ON GLAND PACKING due to linear movement of the stem compared to conventional design.

Less moving parts lead to LONG LIFE AND LESS SPARE PARTS NEEDED. The stem guiding groove is straight resulting in less wear and tear of stem guides compared to conventional design.

Availability of BELLOW SEAL (for lethal service and other critical applications) configuration due to rising stem only.

Control Seal design features UNIQUE TRUNNION PARTS CONFIGURATION that avoids accumulation of particles and dirt in trunnion area and leads to longer life and higher reliability in such environment.

Control Seal is SOLUTION ORIENTED and the valves are designed to meet exact process conditions - PROJECT by PROJECT. Our valves operate where competing valves fail.

CONTROL SEAL SPECIAL CONFIGURATIONS

S&S RSBV - Sand and Slurry execution for long durability and smooth operation in extremely dirty environment such as off-shore drilling.

CRYO RSBV - Cryogenic execution. For this special application our Rising Stem Ball Valve is upgraded with an extended bonnet and will be supplied with low temperature certificate and/or testing.

BELLOW RSBV - Bellow Seal execution for hazardous service where zero emission is required. Can be supplied with helium leak test.

DBB RSBV - Double Block and Bleed execution.

OPERATION

Hand Wheel

Gearbox

Pneumatic actuator

Electric actuator

Hydraulic actuator

Electrohydraulic actuator

Design	API 6D, ASME B16.34
Face to Face dimensions	API 6D, ASME B16.10, B16.47
Flanges	ASME B16.5, B16.25
Fire Safe	ISO 10497, API 6FA, BS 6755
Fugitive Emission	ISO 15848, TÜV, Shell MESC SPE 77-312
Testing	API 598, API6D, ISO 5208
Marking	CE, MSS-SP-25
Topworks	ISO 5210

	1. Closed position In the closed position the ball (red) is tightly pressed against the seat (yellow) by the mechanical wedging action of the stem.		2. Opening As the stem is being raised, a flat sloping surface on the bottom of the stem retracts the ball from the seat.
	3. Rotating As the stem continues its upwards movement the helix of the stem starts the friction-free rotation of the ball.		4. Opened position In fully open position, the stem has reached its upper position and the ball is in place for straight through flow.
	5. Closing To close the valve the stem begins to lower and the ball begins to rotate over the helix.		6. Rotating (2) Continued lowering of the stem makes the helix rotate the ball 90 degrees.
	7. Sealing Nearing the end of the closing cycle the ball has rotated a full 90 degrees without friction between sealing surfaces.		8. Closed position (2) Final movement of the stem makes the helix to mechanically wedge the ball tightly against the seat.