KOSO 501G/550G cage-guided control valve, balanced plug, 1–18 in, ANSI 150–2500

KOSO 501G is the current cage-guided control valve series from KOSO: high flow coefficient Cv and dynamic stability in severe duties. The pressure-balanced plug reduces the required actuator thrust at high pressure drop.

The 550G model uses the 501G body and guide but with a multi-hole cage: the flow is split, reducing noise and cavitation without switching to a dedicated VeCTor trim. Angle versions are 511G and 560G.

Sizes 1–18 inches, ANSI Class 150–2500 and JIS 10K–63K, fluid temperature from −196 to +538 °C. Actuators: 5200LA diaphragm, 6300LA cylinder, 3500LB / 3620LA electronic and 3800LA microprocessor-based.

Key features:

• High Cv with stable control
• Balanced trim for high pressure drop
• 550G: multi-hole cage, low noise and anti-cavitation
• Globe and angle bodies
• Cryogenic down to −196 °C and steam up to +538 °C
• Class VI with soft seat

Specifications:

• Models: 501G Globe, 550G Globe, 511G Angle, 560G Angle
• Nominal size: 1"–18" (25A–450A)
• Pressure rating: ANSI Class 150–2500, JIS 10K–63K
• Fluid temperature: −196…+538 °C
• End connection: flanged RF/RTJ, BW, SW
• Body material: WCB, WC6, LCB, CF8, CF8M etc.
• Trim material: 410SS, SUS630, 316/CF8M etc.
• Rangeability: 50:1 to 20:1
• Characteristic 501G: Linear, Modified Linear, Modified Eq%
• Characteristic 550G: Linear, Eq%
• Leakage, metal seat: ANSI/FCI 70-2 Class IV, V or MSS-SP-61
• Leakage, soft seat: ANSI/FCI 70-2 Class VI
• Actuators: 5200LA, 6300LA, 3500LB, 3620LA, 3800LA

Application: General plant control of steam, water, gas and petroleum products, high pressure drop lines, noise-limited areas (550G), cryogenic media.

Before ordering: For Cv sizing, specify flow rate, density or steam condition, upstream and downstream pressures and temperature.