1SVR730794R3300
The ABB 1SVR730794R3300 (also known as CM‑PVS.41S) is a three‑phase monitoring relay designed to monitor supply for correct phase sequence, phase presence, and over‑/under‑voltage conditions. It continuously checks a three‑phase supply (L1‑L2‑L3) and will trigger its output contacts if a phase failure, phase reversal, undervoltage or overvoltage is detected, optionally after an adjustable delay. The relay is DIN‑rail mountable, compact (22.5 mm width), and suited for control panels, motor control centers (MCCs), switchgear, or other installations where supply‑phase integrity is critical. It's typically used to protect three‑phase motors, compressors, pumps or sensitive equipment from unsafe supply conditions.
FISHER 4221
Technical Parameters
Category Parameter Specification / Description
General Model Series 4221 (within ET Family)
Type Top-Guided Globe Valve
Flow Characteristic Linear, Equal Percentage, or Quick Open (depends on trim).
Pressure & Temperature Pressure Rating (ANSI) ANSI Class 150, 300, 600
Max. Allowable Pressure Up to 1480 psig (102 bar) for Class 600.
Temperature Range Standard: -350°F to 1100°F (-212°C to 593°C). Depends on body/trim materials and seals.
Flow & Sizing Valve Sizes 1/2" to 6" (DN 15 to DN 150)
Flow Capacity (Cv) Ranges from ~1 (for 1/2") to ~200 (for 6"), depending on trim size.
End Connections Flanged (RF, RTJ), Buttweld, or Socket Weld.
Materials & Construction Body Materials Alloy 20 (CN7M) is a very common standard material for the 4221, providing excellent corrosion resistance. Also available in 316 Stainless Steel (CF8M), Hastelloy, Duplex Stainless Steel, and others.
Trim Materials Standard Trim: Stainless Steel.
Severe Service Trim: Hardened alloys, Stellite, Ceramics.
Seat Leakage ANSI Class II, IV, V, or VI (depending on trim selection).
Actuator Mounting Designed for Fisher 1055/1061/1070 series pneumatic diaphragm actuators or other linear actuators.
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