Danfoss ICLX 32-150 Data sheet

Data Sheet

2-step solenoid valve Type ICLX 32-150

Used in wet return and suction lines for the opening against high dierential pressure

ICLX 2-step solenoid valves belong to the ICV family.

ICLX are used in suction lines for the opening against high dierential pressure, e.g. after hot gas defrost in large industrial refrigeration systems with ammonia, uorinated refrigerants or CO2.

The ICLX valve is factory congured to open in 2 steps.

By following a simple procedure the valve can be congured to open in 1 step only.

In 2-step conguration, step 1 opens to approx. 10% of the capacity after the pilot solenoid valves are energized.

Step 2 opens automatically when the pressure dierential across the valve has decreased to approx. 1.25 bar / 18 psig.

The ICLX valve comprises ve main components: Valve body, top cover, function module and 2 pilot solenoid valves. On ICLX 32 – 150 the top cover and function module are factoryassembled.

AI236186441601en-001001

2-step solenoid valve, Type ICLX 32-150

Features

• Designed for Industrial Refrigeration applications for a maximum working pressure of 52 bar / 754 psig

• Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2)

• Can be used in chemical and petro-chemical applications

• Direct welded connections

• Connection types include butt weld, socket weld and solder connections

• Low temperature steel body

• Low weight and compact design

• Only one signal required for both pilot solenoid valves

• The ICLX main valve top cover can be oriented in any direction without the function of pilot valves being aected

• Especially suitable for systems where low pressure drop is required

• Stabilizes working conditions and eliminates pressure pulsations during opening after defrosting

• Provides safety against pressure "shocks" as the valve can only open fully when Δp < 1.25 bar / 18 psig

• Cavitation resistant valve seat

• Manual opening possible

• PTFE seat provides excellent valve tightness

• Service friendly design

• Classication: DNV, CRN, BV, EAC etc. To get an updated list of certication on the products please contact your local Danfoss Sales Company

1 EVM NC

Danfoss

M27H0257_1

EVM NO

1 EVM NC

EVM NO

Danfoss

M27H0258_1

2-step solenoid valve, Type ICLX 32-150

Functions

Function

Figure 1: ICLX 32-65

Figure 2: ICLX 100-150

The ICLX valve is used as a shut-o valve in suction lines to open after hot gas defrost.

The valve is a pilot controlled valve operated by an external pilot pressure source. This means that the valve can operate with no internal pressure dierential (Pd) at all.

Low Pd is the key objective and makes the ICLX valve ideal for applications that are sensitive to dierential pressure. Though Pd is kept low, it can still be quantied, and must be considered when choosing valve size. See section -

Selection of ICLX valve - for the impact.

The main valve is provided with two pilot solenoid valves, as well as a nipple for connection to external pilot pressure.

The external pilot pressure line must be connected to a system pressure (p2) which is at least 1.5 bar / 20 psi higher than the inlet pressure (p1) of the valve. The dierence between the external pilot pressure and the inlet pressure of the valve denes the maximum opening dierential pressure (MOPD) of the ICLX.

The ICLX is kept open when power is applied to the coils placed on the EVM pilot solenoid valves pos. 1 and pos. 2.

The ICLX is closing and kept closed when the coils on EVM pilot solenoid valves pos. 1 and pos. 2 are de-energised.

The pilot solenoid valve (pos.1) allows external pilot pressure (p2) to the bottom of the servo piston and thus opens the rst step corresponding to approx. 10% of the valve capacity. At the same time the bleed spring will be compressed. This will start a pressure equalization of the inlet pressure (p1) to the outlet pressure. When the dierential pressure across the valve has fallen to approx. 1.25 bar / 18 psig the spring will be strong enough to open the second step and open the valve for full capacity.

This way high-pressure pulsations, which would occur when opening for full capacity in one step, can be avoided.

ICLX must not be used in pipe systems where the dierential pressure across the main valve in open position can exceed 1 bar / 15 psig, otherwise the step two on the valve will close.

Danfoss

M27H0231_1

External pressure

Inlet pressure

Outlet pressure

Closed Bleed

Step 1 Step 1 + 2

Time

Open

2-step solenoid valve, Type ICLX 32-150

Figure 3: Two step opening principle

NOTE:



The ICLX valve is kept in its open position by hot gas. The hot gas condenses in the cold valve and creates liquid under the servo piston. When the pilot valves change status to close the ICLX, the pressure on the servo piston equalises with the suction pressure through the pilot valve (pos. 2). This equalisation takes time because condensed liquid is present in the valve.

The exact time taken from when the pilot valves change position to complete closing of the ICLX will depend on temperature, pressure, refrigerant and size of valve. Thus an exact closing time for the valves cannot be given but, in general, lower temperatures give longer closing times.

It is very important to take the closing times into consideration when hot gas defrost is performed on evaporators.

Steps must be taken to ensure that the hot gas supply valve is not opened before the ICLX in the suction line is completely closed. If the hot gas supply valve is opened before the ICLX in the suction line is closed, considerable energy will be lost and potentially dangerous situations might arise because of “liquid hammer”. In ICLX valves, the spring-loaded second stage might be induced to hammer by gas and liquid being forced through the valve at ∆p >

1.5 bar across the ICLX. The nal result could be severe damage to the valve.

As a rule of thumb a closing time of 2 minutes can be used as a starting point. The optimum closing time for each individual system must be determined at initial start-up of the plant at intended operational conditions. It is recommended to check if the closing time needs to be changed when conditions changes (suction pressure, ambient temp. etc.) and closing time should be checked at service of the valve. Once the optimum closing time has been identied it is recommended to add a safety margin of 30 sec. to the optimum closing time.

2-step solenoid valve, Type ICLX 32-150

Media

Refrigerants

Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2).

New refrigerants

Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.

When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for specic refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.

Description

Values

Media temperature range

-60 °C / +120 °C / -76 °F / +248 °F

Max. working pressure

The valve is designed for a of 52 bar / 754 psig

Max. opening pressure dierential (MOPD):

21 bar / 305 psi @ external pressure 1.5 bar / 22 psi higher than inlet pressure of the valve

40 bar / 580 psi @ external pressure 2 bar (30 psi) higher than inlet pressure of the valve

Unit

ICLX 32

ICLX 40

ICLX 50

ICLX 65

ICLX 100

ICLX 125

ICLX 150

kv (m3/h)

22294782151

225

390

Cv (US

gal/min

)

25.5

33.6

54.595175

261

452

Description

Values

Surface protection

The ICLX external surface is zinc-chromated to provide good corrosion protection

Description

Values

Coil requirements:

Both coils to be IP67

EVM NC: 10W AC (or higher) for MOPD up to 21 bar

EVM NC: 20W AC for MOPD 21 – 40 bar

EVM NO: 10W AC (or higher)

ICV 32

ICV 40

ICV 50

ICV 65

2-step solenoid valve, Type ICLX 32-150

Product specication

Pressure and temperature

Table 1: Pressure and temperature data

Table 2: CV and KV values

Surface coating

Table 3: Surface coating

Coils

Table 4: Coils

The ICLX Concept

The ICLX concept is developed to highest exibility of direct welded connections. For valve sizes ICV 32 – ICV 65 a wide range of connection sizes and types is available. ICV 100 – ICV 150 are available in butt-weld DIN and butt-weld ANSI nominal sizes. The direct welded (non-anged) connections secures low risk of leakage.

Design

Valve body and top cover material

Low temperature steel

There are seven valve bodies available

Table 5: ICV 32, 40, 50 and 65

Danfoss

M27H0259_1

Danfoss

M27H0260_1

ICV 100

ICV 125

ICV 150

No.

Part

Material

ASTM

Valve body

Low temperature steel

G20Mn5QT, EN 10213-3

LCC, A352

Top cover

ICLX 32-65: Low temperature steel

ICLX 100-150: Low temperature

steel

P285QH, EN 10222-4 P275NL2,

EN 10028

LF2, A350

Main piston

Steel

Bleed piston

Steel

Seat plate main

PTFE

Seat plate bleed

PTFE7Gasket

Fibre, non-asbestos

Spindle manual opener

Stainless steel

Packing gland

Steel10Insert

Steel

Spring - main

Stainless steel

Spring - bleed

Stainless steel

O-ring

Chloroprene (neoprene)

O-ring

Chloroprene (neoprene)

2-step solenoid valve, Type ICLX 32-150

Table 6: ICV 100, 125 and 150

Material specication

Figure 4: ICLX 32-65

Table 7: Material specication

Figure 5: ICLX 100-150

+ 15 hidden pages

Danfoss ICLX 32-150 Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual