© Danfoss A/S (AC-MCI/MWA), 2013-08 DKRCI.PK.000.H2.02 97
Designed for industrial refrigeration
applications for a maximum working pressure of 52 bar g/754 psi g.
Applicable to HCFC, HFC, R717(Ammonia) and R744 (CO 2).
Direct coupled connections
Connection types include butt weld, socket weld, solder and threaded connections. Low temperature steel body
Low weight and compact design.
V-port regulating cone ensures optimum regulating accuracy particularly at part load.Function module has a QPQ surface treated inrt and a steel piston ring ensuring preci control accuracy.
ICV 4”, 5” and 6” ANSI with NPT threaded pressure outlet in the outlet of the valve.Replaceable Teflon valve at for ICS 25-80Maintenance spare part kit available for ICS 100-150.
Features
Modular Concept
– Each valve body is available with veral different connection types and sizes
– Valve overhaul on ICS 25-80 is done by replacing the function module
爱词霸翻译– Possible to convert ICS rvo to ICM motor valve
Manual opening.
The ICS valve is a multifunction valve where veral pilot valves can be mounted into the pilot ports.
The standard range of pilot valves can be ud on all sizes of ICS valves. Pilot valves can be either screwed directly into the ICS valve, thus eliminating the need for solder/weld connections or external pilot lines.
Pressure gauge connection port to measure valve inlet pressure.上海留学
The top cover can be rotated into any possible position without affecting the operation of the valve.
98 DKRCI.PK.000.H2.02 © Danfoss A/S (AC-MCI/MWA), 2013-08
Pilot controlled rvo valves, type ICS Design
ICS valves are designed as pilot operated valves requiring minimal pressure differential to open. If the pressure difference is 0 bar/0 psi, the ICS valve will be clod. If the pressure difference is 0.2 bar/3 psi or more, the ICS valve will be fully open. At pressure differences between 0.07 bar/1 psi and 0.2 bar /3 psi, the opening degree will be correspondingly proportional.
The ICS is available for u with either one or three pilot valves.
Two of the three pilot pressure connections (S1 and S2) are connected in ries whilst the third (P) is connected in parallel to S1 and S2. This allows different combinations of pilot valves to be ud, thus providing numerous variations in control functions.
Connections
There is a very wide range of connection types available with ICS valves:D: Butt weld, DIN (2448) A: Butt weld, ANSI (B 36.10)J: Butt weld, JIS (B S 602)
SOC: Socket weld, ANSI (B 16.11)SD: Solder connection, DIN (2856)SA: Solder connection, ANSI (B 16.22)
FPT: Female pipe thread (ANSI/ASME B 1.20.1)
Approvals
The ICV valve concept is designed to fulfill global refrigeration requirements.
For specific approval information, plea contact Danfoss.
The ICS valves are approved in accordance with the European standard specified in the Pressure Equipment Directive and are CE marked.
dry是什么意思For further details / restrictions - e Installation Instruction
Valve body and top cover material Low temperature steel
ICS valves
publishNominal bore DN≤ 25 (1 in.)
DN 32-65 (11/4 - 2½ in.)
DN 80-125 (3 - 5 in.)
Classified for Fluid group I
Category
Article 3, paragraph 3
worstII
中文系跨专业考研
III
Technical dataoversize
Refrigerants
Applicable to HCFC, HFC, R717(Ammonia) and R744 (CO 2).
U with flammable hydrocarbons cannot be recommended; plea contact Danfoss.Temperature range
–60/+120°C (–76/+248°F).Surface protection ICS 25-150:
The external surface is zinc-chromated to provide good corrosion protection.
Pressure range
The valve is designed for:
Max. working pressure: 52 bar g (754 psig)
Opening differential pressure:
Fully open: Min. 0.2 bar g (min. 3 psig)
Max. Opening Pressure Differential (MOPD), solenoid valves only - at nominal conditions. – 10 up to 21 bar (305 psi) – 20 up to 40 bar (580 psi)
Pilot controlled rvo valves, type ICS
The ICS Concept
The ICS concept is developed around a modular principle. This
freshman中学gives the possibility of combining function modules and top
covers with special valve body size that is available in a variety of
connection possibilities.
ICV 100ICV 125ICV 150
available with a range of undersizes through
oversized connection sizes and types.
ICV 100 - ICV 150 are available in butt-weld
vista
Each valve body may be fitted with a 1 pilot or
3 pilot top cover.
© Danfoss A/S (AC-MCI/MWA), 2013-08 DKRCI.PK.000.H2.02 99
100 DKRCI.PK.000.H2.02 © Danfoss A/S (AC-MCI/MWA), 2013-08
Pilot controlled rvo valves, type ICS In ICS, multiple inrts (function modules) are
available to give different capacities.
The ICS Concept (continued)
© Danfoss A/S (AC-MCI/MWA), 2013-08 DKRCI.PK.000.H2.02 101
Pilot controlled rvo valves, type ICS
The ICS main valve is a pilot operated valve. The types of pilot valves ud determine the function. The ICS main valve with pilot valve(s) controls refrigerant flow by modulation or on/off in accordance with the pilot valve and main valve status. The manual spindle can be ud to open the valve plate.
The opening degree of the main valve is determined by the pressure difference
(differential pressure) between pressure p 2, which acts on top of the rvo piston (3b), and pressure p 3, which acts on the underside of the rvo piston.
If this pressure difference is 0, the main valve will be fully clod.
If the pressure difference is 0.2 bar (3 psi) or greater, the main valve will be fully open.
At pressure differences (p 2 - p 3) between 0.07 bar (1 psi) and 0.2 bar (3 psi), the degree of opening will be correspondingly proportional.
The port of the throttle cone (3e) is V-shaped, which provide good regulation characteristic to pilot operated main valves even at low loads. P 3 pressure is equal to the valve outlet pressure (P 4), due to a clearance between the piston rod (3g) and the function module. The opening
degree of the ICS valve is therefore controlled by the application of P 2 pressure acting on top of the rvo piston, which is equal to or greater than valve outlet pressure (P 4).
p 2 = p 4 ~ clod
p 2 = p 4 + 0.2 bar (3 psi)~ fully open
p 4 ≤ p 2 ≤ p 4 + 0.2 bar (3 psi) ~ proportional degree of opening.
spontaneousICS 1 Pilot and ICS 3 Pilot 1. Body
1a Pilot channel to inlet side
1b Circular gap between hou and module 2. Top cover
2a Pilot channels in top cover 2b Pilot inrtion hole
2c Pressure gauge connection 2d Piston top inlet channel 2e Cross channel SI to SII 2f Inlet channel 2g Circular groove 3 Function module 3a Cylinder 3b Piston 3c Valve plate 3d Spring 3e Cone
3f Equalisation orifice 3g Piston rod p 1 Inlet pressure
p 2 Pressure on piston
p 3 Pressure underneath piston p 4 Outlet pressure
8
Manual operating spindle
The maximum pressure (p 2) can act on the top of the rvo piston (3b). p 2 normally corresponds to the pressure, p 1 - ICS main valve inlet pressure.Inlet pressure p 1 is led, via the drilled channels (1a, 1b, 2f, 2b (pilot), 2a, 2d) in the valve body (1) and cover (2) through the individual pilot valves and onto the top of the rvo piston (3b).The degree of opening of the individual pilot valves determines the magnitude of pressure p 2 and thus the degree of opening of the main valve. The equalisation hole (3f) in the rvo piston (3b) ensures that pressure p 2 is balanced in accordance with the degree of opening of the pilot valve.
Note:
When ICS valves with 3 pilot ports are ud with external pressure connector (fig. 2, pos. 61), the valve port inlet pressure will be isolated.The ICS can be fitted with just a single screwed-in pilot valve or external pilot connection. The degree of opening of the main valve will be in accordance with the control status of the pilot valve or external pilot flow control.
ICS main valve with one pilot connection is fully clod when the pilot valve is fully clod and fully open when the pilot valve is fully open. Otherwi the degree of opening of the main valve is proportional to the degree of opening of the pilot valve.
The ICS 3 pilot version can be fitted with one, two, or three pilot valves so that up to three regulating functions are possible. If the external pilot connection is ud, more functions can be added.
