Daikin AVS - Modulating Valves - MicroTech II; Modulating Valve Specifications

Page 22 of 60 IM 817-4
2-Way and 3-Way Modulating Valves – MicroTech II™
Control Floating Point Modulating
Electrical 20 to 30 VAC at 50/60 Hz or 24 VDC ± 10%
Transformer 12 VA (class 2 power source)
Stroke 29/32 in. (23mm) max. 76 seconds
Spring Return 4 to 9 seconds at room temperature (stem up)
Operating Temperature
35 to 250
o
F (2 to 121
o
C); 15 psig (103 kPa)
saturated steam
The modulating control valves for MicroTech II are designed to regulate
theowofhotwater,chilledwaterandsteam.Theyconsistofabronze
bodyvalvewithaspringreturn,oatingpointactuator.Theoptional
valveaccessoryisshippedseparatefromtheunitventilatorforeld
installationtopreventshippingdamageandtoprovideexibilityin
makingtheeldpipingconnection.
Figure 62 - 2-Way and 3-Way Modulating Valve Actuators
Table 16. Valve Body Specications
400 psig (2.756 ,PA) up to 150
o
F
Water (66
o
C) decreasing to 365 psig
Static
(2,515 kPa) at 248
o
F (120
o
C)
Pressure
38 psig (262 kPa) Saturated steam at
Steam
284
o
F
Fluid Temperature
35 to 250
o
F (2 to 121
o
C); 15 psig
(103kPa) saturated steam
Table 15. Actuator Specications
2-Way Modulating Valve
3-Way Modulating Valve
Valve Size, in. (DN)
A B C
N.O./N.C./Three Way 2-Way N.O. 2-Way N.C. Three-Way
1/2 (DN15)
3 13/16 1-9/16 1-3/16 8
(76) (21) (39) (46) (203)
3/4 (DN20)
3-7/32 15/16 1-5/8 2-1/8 8
(81) (24) (41) (54) (203)
1 4-1/8 1-5/32 1-3/4 2-9/16 9-7/32
(DN25) (119) (29) (44) (65) (234)
1-1/4 4-23/32 1-11/32 2 2-25/32 9-7/32
(DN32) (119) (34) (51) (70) (234)
2-Way Modulating Valve
3-Way Modulating Valve
Modulating Valve Specications – MicroTech
II™
Table 17. 2-Way and 3-Way Modulating Valve Dimensions
4-3/32"
(104mm)
3-5/32"
(80mm)
6-13/16"
(173mm)
A
B
C
3-19/32"
(91mm)
11/32"
(8mm)
4-3/32"
(104mm)
3-5/32"
(80mm)
6-13/16"
(173mm)
A
B
C
3-15/16"
(100mm)
11/32"
(8mm)
Figure 63
Figure 64