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Indicators

Clogging Indicators for

Process Filters

1. TECHNICAL

SPECIFICATIONS

1.1 GENERAL

HYDAC clogging indicators are

designed to indicate visually and/or

electrically when the filter elements must

be cleaned or changed.

The use of clogging indicators

guarantees both the operational safety

of the system and the efficient utilisation

of the filter elements.

1.2 SEALS

V (=Viton) or T (=FEP encapsulated)

2. QUICK SELECTION:

CLOGGING INDICATORS ACCORDING TO FILTER TYPE

Please select from the table the clogging indicator required for your filter.

1.4 SPECIAL INDICATORS

Electrical ATEX indicators:

Optional: electrical indicator for

process filters for use in potentially

explosive atmospheres subject to the

ATEX equipment directive 94/9/EC

and the ATEX operator directive

1999/92/EC.

1.5 TORQUE VALUES - DIFFERENTIAL

PRESSURE INDICATORS

Note:

The clogging indicators must only be

tightened or adjusted on the spanner

flats.

z PVD..B.1: SW27

z PVD..C.0: SW30

z PVD..D.0/L...: SW30

max. torque value: 100 Nm

1.3 CONSTRUCTION

Differential pressure indicators are

used on all process filters. They react

to the pressure differential between the

filter inlet and filter outlet which rises

as the level of contamination in the

element increases.

The simplest fitting of the differential

pressure indicator:

G ½" cavity

(to HYDAC works standard HN 28-22)

The differential pressure indicator type

V01 is piped up separately.

For duplex filter housings the

differential pressure indicators are

connected using an adaptor block.

Clean side

Contaminated

side

Type Filter types

PRFL

PRFLD

PRFS

PRFSD

PFL

PFM

PFH

EDF PMRF

PMRFD

PVD ..B

z z z z z

PVD ..C

z z z z z

PVD ..D

z z z z z

V01...VZ

z z

on request

Differential pressure gauge

z z z

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Indicators

PVD 2 D. 0 / -L24

Differential pressure clogging indicator

PVD = clogging indicator

V01 = clogging indicator

Pressure setting

0.8 = +0.8 bar (only for V01 indicator)

1 = +1 bar (PVD indicator)

1.5 = +1.5 bar (PVD indicator)

2 = +2 bar (all indicators)

3 = +3 bar (PVD indicator)

4.3 = +4.3 bar (only for V01 indicator)

5 = +5 bar (only for PVD indicator)

8 = +8 bar (only for PVD indicator)

Type of clogging indicator

B. = visual indicator with automatic reset

C. = electrical indicator

D. = visual/electrical indicator

VZ = visual/analogue indicator with 75% and 100% switch contacts

Modification number

0 = all clogging indicators

1 = only B. type

Supplementary details (only PVD)

-L24 = light with 24 V

-L48 = light with 48 V

-L110 = light with 110 V

-L220 = light with 220 V

3. MODEL CODE

Differential pressure gauge DS11 electrical

Indication range: 0 - 1.6 bar

Permissible operating pressure: 25 bar

Pressure chamber in aluminium: order number 639311

Pressure chamber in stainless steel: order number 639586

Other models on request

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Indicators

4. SPECIFICATIONS

Visual, red/green band

Automatic reset

110 g

1 bar ± 10% 3 bar ± 10%

1.5 bar ± 10% 5 bar ± 10%

2 bar ± 10% 8 bar ± 10%

420 bar

-20 °C to +100 °C

G ½

100 Nm

–

PVD 2 B.1

Type of indication

Weight

Cracking pressure or

indication range

Perm. operating pressure

Perm. temperature range

Connection thread

Max. torque value

Switching type

Max. switching voltage

Electrical connection

Max. switching output

at resistive load

Switching capacity

Protection class

to DIN 40050

Order example

PVD x B.x

Electrical switch

220 g

1 bar ± 10% 3 bar ± 10%

1.5 bar ± 10% 5 bar ± 10%

2 bar ± 10% 8 bar ± 10%

420 bar

-20 °C to +100 °C

G ½

100 Nm

N/C or N/O

(change-over contacts)

230 V

Male connection M20x1.5 to EN 50262

Female connector to DIN 43650

60 W =

100 VA ~

Ohmic 3 A at 24 V =

Ohmic 0.03 to 5 A at max. 230 V ~

IP 65 (only if the connector is

wired and fitted correctly)

PVD 5 C.0

Type of indication

Weight

Cracking pressure or

indication range

Perm. operating pressure

Perm. temperature range

Connection thread

Max. torque value

Switching type

Max. switching voltage

Electrical connection

Max. switching output

at resistive load

Switching capacity

Protection class

to DIN 40050

Order example

PVD x C.x

Visual indicator and electrical switch

250 g

1 bar ± 10% 3 bar ± 10%

1.5 bar ± 10% 5 bar ± 10%

2 bar ± 10% 8 bar ± 10%

420 bar

-20 °C to +100 °C

G ½

100 Nm

N/C or N/O

(change-over contacts)

24, 48, 110, 230V depending on the

light insert

Male connection M20x1.5 to EN 50262

Female connector to DIN 43650

60 W =

100 VA ~

Ohmic 3 A at 24 V =

Ohmic 0.03 to 5 A at max. 230 V ~

IP 65 (only if the connector is

wired and fitted correctly)

PVD 2 D.0 /-L24

Type of indication

Weight

Cracking pressure or

indication range

Perm. operating pressure

Perm. temperature range

Connection thread

Max. torque value

Switching type

Max. switching voltage

Electrical connection

Max. switching output

at resistive load

Switching capacity

Protection class

to DIN 40050

Order example

PVD x D.x /-L...

M20x1.5 to

EN 50262

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NOTE

The information in this brochure relates to the operating conditions and applications

described. For applications or operating conditions not described, please contact the

relevant technical department.

Subject to technical modifications.

Process Technology GmbH

Am Wrangelflöz 1

D-66538 Neunkirchen

Tel.: 0 68 21 / 86 90 - 0

Fax: 0 68 21 / 86 90 - 200

Internet: www.hydac.com

E-Mail: prozess-technik@hydac.com

Visual/analogue indicator

and 1 electrical switching contact at

75% and 100% of the cracking pressure

650 g

0.8 bar ± 10%

2.0 bar ± 10%

4.3 bar ± 10%

160 bar

-20 °C to +100 °C

G ¼

–

75% - N/O contact

100% - N/C contact

250 V

Threaded connection

M20x1.5 to EN 50262

75% contact 100% contact

120 W = 30 W =

120 VA ~ 60 VA ~

Ohmic 2.5 A at 24 V =

Ohmic 1 A at max. 250 V ~

IP 55

V01 2 VZ.0

Type of indication

Weight

Cracking pressure or

indication range

Perm. operating pressure

Perm. temperature range

Connection thread

Max. torque value

Switching type

Max. switching voltage

Electrical connection

Max. switching output

at resistive load

Switching capacity

Protection class

To DIN 40050

Order example

V01 x VZ.x

2 microswitches, 1 pole change-over

contacts, can be adjusted manually to

recommended set values

1.2 - 3.5 kg

0 - 1.6 bar

0 - 4 bar on request

25 bar, 40 bar on request

-10 °C to +100 °C

G ¼

–

Change-over contacts

U~max = 250 V AC

U~max = 30 V DC

Hard-wired numbered cable, cable

connector, 7 pole plug-in connection

Imax = 5 A, Pmax. = 250VA

Imax = 0.4 A, Pmax. = 10 W

–

IP 55

Pressure chamber in

aluminium: 639311

Pressure chamber in

stainless steel: 639586

Type of indication

Weight

Cracking pressure or

indication range

Perm. operating pressure

Perm. temperature range

Connection thread

Max. torque value

Switching type

Max. switching voltage

Electrical connection

Max. switching output

at resistive load

Switching capacity

Protection class

To DIN 40050

Order example

Differential pressure gauge DS11

inlet

(contaminated side)

outlet

(clean side)