OVERVIEW
ALVB/ALVM series large sized pressure balanced cage type control valves have high-performance specifications and are designed for heavy duty service. The valve body has large capacity, wide range ability and high accuracy flow characteristics. The valve plug is structured in a
pressure balanced type that permits flow control of high differential pressure with a small actuating force. A piston ring (seal ring) put around the valve plug restrains a excessive flow between the valve plug and the cage and prevents from seat leakage and sticking problems. A powerful diaphragm actuator or high-performance piston cylinder actuator is mounted on the valves and realized stable fluid control.
Therefore, the model ALVB/ALVM are widely applicable for control of high differential pressure process lines where dynamic stability, low noise and anti-cavitation/flashing are required.
SPECIFICATIONS
Body Type: Straight-through, cast globe valve
Nominal size: 14, 16, 18, 20 inches
Pressure rating:
• Model ALVB: JIS 10K, ANSI 150, JPI 150
• Model ALVM: JIS 20K, ANSI 300, JPI 300
End connections: Flange end(RF)
For body/trim material combinations and operating temperature ranges, refer to Table 1.
Bonnet: Plain bonnet (-5 to 200°C)
Gland type: Bolted gland
Packing/Grease: Grease not provide
When V shaped PTFE packing and PTFE yarn packing is used.
Gasket Type: Serrated type
Material: SUS316 PTFE coating
Trim
Valve plug: Single seated pressure balanced type
Cage: Metal seat
(For flow characteristics, refer to Figure 1 and Figure 2.)
-Equal percentage (%V))
-Linear (LV)
Materials
For body/trim material combinations and operating temperature ranges, refer to Table 1.
Actuator Type:
-Single acting diaphragm actuator (Model VA5)
-Piston actuator (Model PPA6)
Action: Direct or reverse action
Diaphragm
Type VA5: Cloth-embedded chloroprene rubber
Spring range
Type VA5
40 to 200 kPa {0.4 to 2.0 kgf/cmÇ}
80 to 240 kPa {0.8 to 2.4 kgf/cmÇ}
Supply pressure:
Diaphragm actuator
Type VA5 : 270 kPa {2.8 kgf/cmÇ}
Piston actuator
Type PPA : 490 kPa {5 kgf/cmÇ}
Note) Allowable differential pressure is depended on spring range and air supply pressure.
Air connection: Rc1/4 or 1/4NPT internal thread
Note) Rc1/4 or 1/4NPT adapter is provided on Rc1/2 internal thread.
Ambient temperature: -30 to 70 °C
Valve action
Air-to-close (Direct action actuator is combined.)
Air-to-open (Reverse action actuator is combined.)
Optional accessories
Positioner, pressure regulator with filter, hand wheel, limit switch, solenoid valve, motion transmitter, booster relay, lock-up valve, and others
Note) 1. For the optional items, refer to specification sheets and installation drawings of respective accessories.
2. Accessories with an asterisk mark (*) are selected from among the following types depending on the actuators to be combined.
Additional specifications (by special order)
• Special inspection
Flow characteristics inspection, material inspection (material certificate), non-destructive inspection, steam inspection, low-temperature inspection
• With drain plug
• Double gland
• Oil/water free treatment
• Copper free treatment
• Stainless steel (SUS304) atmosphere-exposed nuts and bolts
• Special air piping and joint
• Sand-/ dust-preventive measures
• Saline damage countermeasures
• Cold-area use specifications
• Tropical-area use specifications
• Vacuum service
• Actuator yoke material SCPH2*
Note) *: SCPH2 is standard materials for model PPA6 actuator yoke
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