MPFiltri DEH Series Manual
Operators Guide DEH Series
Differential Clogging Indicator
Hazardous Area
Operators Guide
Operators Guide
PRODUCT OVERVIEW
• Construction from AISI 316 Stainless steel
• 420 bar (6,091 PSI) maximum working pressure
• Approved for use in hazardous environments
• ATEX, IECEX, UL, CSA, and TRCU EAC certication
• Compact and reliable design
• Fully tested to one million cycles at maximum working pressure
Designed to thrive in hazardous work environments, the indicators provide critical early warnings for operators, alerting them that lter
elements need to be cleaned or changed.
Suitable for a wide variety of applications from oil, sea and gas to industrial production plants, the indicators have been designed to
prevent machinery failures, reduce unplanned downtime, and improve safety.
New DEH series of ATEX clogging indicators
Features & Benets
The new DEH series features three different models each with a distinct connection type.
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Operators Guide
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Operators Guide
PRODUCT OVERVIEW
Product Presentation
Filter elements are efcient only if their dirt holding capacity is fully exploited. This is achieved by using lter housings equipped
with DEH Series clogging indicators.
These devices trip when the lter elements become blocked which causes an increase in the pressure drop across the lter.
The indicator is set to alarm before the element becomes fully clogged. This indicator will reduce the frequency of replacing lter
elements as well as maximising the performance of each lter.
• Constructed from AISI 316 stainless steel 420 bar (6,091 PSI)
• 420 bar (6,091 PSI) maximum working pressure
• Approved for use in hazardous environments
• ATEX, IECEX, UL, CSA and TRCU, EAC certied
• Temperature class T4 (135 °C) and T6 (85 °C)
• Protection grade IP66 or IP67 when used with suitable cable gland
• Indication range from 5 bar to 7 bar
• Suitable for use with all MP Filtri stainless steel pressure lters and cast iron pressure lters
Benets
• Prevents machinery failures
• Cuts unplanned downtime
• Critical early warning system
• Saves time and costs
• Improves safety
Disclaimer
As part of our policy of continual improvement, MP Filtri reserves the right to alter the specication without prior notication.
Area of Application
Hazardous Area Indicators can only be used in the appropriate zone classication.
Ex d indicators should only be used in zones 1 and 2 - zones in which potentially explosive atmospheres created by
gases, vapours or mists are unlikely to occur in normal operation. In the event of an occurence, the situation will persist
for only a short period.
Ex ia indicators can be used in zones 0, 1 and 2. These are suitable in an area where explosive atmospheres are
continually present. For more information please see section 6 - Certication.
• Marine
• Mining
• Petrochemical
• Offshore oil and gas
• Saw mills
• Paper mills
• Car plants
• Industrial plants
• Storage silos
• Hazardous environments
The full range of applications the DEH series is designed for includes:
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Operators Guide
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Operators Guide
DECLARATION OF CONFORMITY
EC Declaration of Conformity
The products included in this Declaration are all variants of the following:
• Standard (2.5 bar) or High Pressure (4.5 bar)
• Compatible with mineral oil/ synthetic uids, offshore uids, phosphate esters (inc. aerospace versions)
• Glass or Acrylic Chamber
• All power supply options
For part codes see the Designation & Ordering Code (section 3.3 on page 16).
Product Manufacturer:
MP Filtri UK
Bourton Industrial Estate
Bourton on the Water
Cheltenham
Gloucestershire
GL54 2HQ
01451 822522
sales@mpltri.co.uk
The products described are in conformity with the following directives:
2014/34/EU
Certication Testing that has been carried out is in accordance with:
• BS EN 10272
• EN/IEC 60079-0:2012 + A 11:2013
• EN/IEC 60079-11:2012
• EN/IEC 60079-31: 2014
• IEC 60079 - 11 2012
• UL 1203
• CAN/USA C22.2 No. 25-1966
• CAN/USA C22.2 No. 30-M1986 + 2:1988-11
• ISO 10771-1
Date: July 2020
Signed
Phil Keep (Managing Director) on behalf of MP Filtri UK Ltd
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Operators Guide
Product overview 1
EC Declaration of Conformity 5
1 General warnings and information for the Operator 8
1.1 General safety warnings 8
1.2 Operator informations and Warnings 10
2 Warranty, Limitations and Disclaimers 12
3 Technical Specication 14
3.1 General Specication 14
3.2 Dimensions 16
3.3 Designation & Ordering code 16
3.4 Wiring Instructions 17
3.5 Temperature Range 17
4 Product Installation and Maintenance 18
4.1 Special Conditions of Safe Use 18
4.2 Installation Instructions 18
4.3 Wiring Instructions 19
4.4 Suitable Operating Fluids 20
4.5 Commissioning 20
4.6 Specic Conditions for Safe Use 20
4.7 System Requirements 21
5 Technical Specication 21
5.1 Spare Parts 21
6. Certication 22
6.1 ATEX 22
6.2 IECEX 22
6.3 UL/CSA 23
6.4 TR/CU 23
6.5 Fatigue Declaration 23
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Operators Guide
TABLE OF CONTENTS
7 Servicing 24
7.1 General Information 24
7.2 Torque Values 24
7.3 Service Measures 24
7.4 Service Intervals 24
7.5 Seal Replacement 24
7.6 Removing the Clogging Indicators 58
7.7 Installing the Clogging Indicators 58
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Operators Guide
It means that failure to comply with the relevant safety regulations may result in mild injury or property damage.
It relates to important information concerning the product, its use or part of this documentation
to which special attention must be paid
It means that failure to comply with the relevant safety regulations may result in death, serious injury
or serious property damage.
CAUTION
NOTE
DANGER
!
!
!
1 General warnings and information for the Operator
1.1 General Safety Warnings
Do not operate, maintain or carry out any procedure before reading this manual. Any individual operating the unit shall wear the
following Personal Protective Equipment:
- Protective eyewear
- Safety shoes
- Gloves
- Overalls (or other suitable protective clothing)
Before carrying out any machine installation procedures and/or before use, one should scrupulously follow the in- structions listed
in this manual. Moreover, it is necessary to comply with the current regulations related to occupational accident prevention and
safety in the workplace.
Notices aimed at the prevention of health hazards for personnel operating the machine are highlighted in this document with signs
having the following meaning:
Failure to comply with the relevant safety regulations may result in death, serious injury or serious property damage.
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Operators Guide
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