Product Overview

Technical Instructions MXG461…U, MXF461…U Modulating Control Valves
Document Number CA1N4455E-P25 with Magnetic Actuators
May 8, 2009
Page 6 Siemens Building Technologies, Inc.
Specifications
Electrical Interface
Power supply Class 2
Supply voltage 24 Vac, 50/60 Hz
– Maximum voltage tolerance +20/–15%
Control signal (user-selected) 0 to 10 Vdc, 2 to 10 Vdc, or 4 to 20 mA
Software class Class A
Nominal power See Sizing
Position Signal Y 0 to 10 Vdc, 2 to 10 Vdc, or 4 to 20 mA
Impedance 0 to 10 Vdc or 2 to 10 Vdc 100k Ω //5nF
4 to 20 mA 100 Ω //5nF
Position feedback signal 0 to 10 Vdc; load resistance > 500 Ω
Product Specific Data Applications To EN60730
Nominal pressure 232 psi (16 bar)
Permissible Operating pressure p
e
max 150 psi
Differential pressure ΔP
max See Table 1
Leakage at ΔP
v = 14.5 psi (0.1 Mpa) (1bar) A → AB Max. 0.02 % Cv (to IEC534-4)
B → AB Depends on operating
conditions (<0.2% C
v)
Admissible media Water, or water/glycol mixtures with
maximum 50% glycol
Temperature of medium 34°F to 266°F (1°C to 130°C)
Valve characteristic (stroke, k
vs) Linear or equal percentage (user-
selected), optimized near the closing
point (to IEC534-2-4)
Stroke resolution ΔH/H
100 1:1000 (H = stroke)
Hysteresis Typically 3%
Type of operation Modulating
Manual adjustment Yes, with handwheel
Position with actuator de-energized A → AB closed
Orientation Upright to horizontal
Note that orientation affects protection
standard
Positioning time <2 seconds
Materials (valve body) Housing parts Cast iron
Plug CrNi Steel
Seat Brass
Valve stem seal EPDM (O-ring)
Bellows Tombac, bronze, CrNi steel
Electrical connection Connection terminal Screw terminals
Per terminal, with wire (no lug) 2 × 16 AWG or 1 × 14 AWG
Per terminal with wire 2 × 16 AWG or 1 × 12 AWG
Miscellaneous Weight (including packaging) See Dimensions
Dimensions See Dimensions
Ambient conditions Maximum ambient temperature 113°F (45°C)
Agency Approvals UL listing Per UL 873
C-UL Certified to Canadian Standard
C22.2 No. 24
Suitable for use in air handling spaces
NEMA Type 1