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The VK4-7223-303-4-7 pneumatic globe control valve assembly from Schneider Electric is engineered for precise fluid control. It features a two-way valve design that normally remains closed, incorporating a factory-fitted positive positioner to ensure accurate operation.
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| Manufacturer | Schneider Electric |
|---|---|
| Product Type | Pneumatic globe control valve assembly with positive positioner |
| Product Line | VB Series |
| Part Number | VK4-7223-303-4-7 |
| Valve Pattern | Two-way, Stem-Up-Closed (Normally Closed) |
| Valve Size | 1 in. NPT |
| Flow Coefficient (Cv) | 14 Cv (Kvs 12.1) |
| End Connection | NPT Threaded |
| Body Material | Bronze |
| Trim Material | Brass plug/EPDM disc |
| Actuator Model | MK-4621 pneumatic actuator (11 sq. in. effective area) |
| Spring Range | 10 to 13 psig |
| Actuator Linkage | AV-401 |
| Positive Positioner | AK-42309-500 (factory-fitted) |
| Supply Air Pressure | 15/20 psig |
| Close-off Pressure Rating | 30 psi with 15 psig supply; 60 psi with 20 psig supply |
| Operating Temperature Range | -7°C to 138°C (control media) |
| ANSI Pressure Class | 250 psi (400 psi max. at temperatures below 65°C) |
The VK4-7223-303-4-7, part of Schneider Electric's VB Series, epitomizes an efficient solution for fluid control through its pneumatic globe valve design. This assembly, crafted with precision, employs a two-way, stem-up-closed pattern that operates in a normally closed position. The valve measures 1 inch in NPT size, making it suitable for various applications requiring robust flow regulation. Its body is constructed from bronze, and internally, it features a brass plug with an EPDM disc for enhanced durability and sealing.
The valve also boasts a flow coefficient rated at 14 Cv (equivalent to 12.1 Kvs), ensuring an effective flow rate. The MK-4621 pneumatic actuator drives the valve's operations, featuring an effective area of 11 square inches. The actuator linkage utilized is the AV-401, facilitating seamless integration into system designs. A positive positioner, AK-42309-500, is factory-fitted to ensure high precision in valve positioning.
For operation, the supply air pressure must range between 15 psig and 20 psig. The valve can achieve a close-off pressure of 30 psi with a lower supply pressure or up to 60 psi with the higher pressure. Designed to function within a temperature spectrum of -7°C up to 138°C for control media, it meets varied environmental needs. Furthermore, its ANSI pressure class is rated at 250 psi, with a maximum of 400 psi permissible at temperatures below 65°C, establishing its resilience in demanding conditions.