Instruction Manual
DG08
Sight Flow Indicator with ball
PKP Prozessmesstechnik GmbH
Borsigstraße 24
D-65205 Wiesbaden-Nordenstadt
Tel.: ++49-(0)6122-7055-0
Fax: ++49-(0)6122-7055-50
Email: info@pkp.de
Table of Contents
Safety Information..................................................................................................................2
Functional description............................................................................................................3
Maintenance and care...........................................................................................................3
Safety Information
General Instructions
To ensure safe operation, the device should only be operated according to the specifica tions in the instruction manual. The requisite Health & Safety regulations for a given
application must also be observed. This statement also applies to the use of accessories.
Every person who is commissioned with the initiation or operation of this device must have
read and understood the operating instructions and in particular the safety instructions!
The liability of the manufacturer expires in the event of damage due to improper use, nonobservance of this operating manual, use of insufficiently qualified personnel and unauthorized modification of the device.
Proper Usage
The flow indicators of the series DG08 are used for the optical control of liquids and
gases. Any other use of the device is prohibited and outside the scope of application.
In particular, applications in which shock loads occur (for example, pulsed operation)
should be discussed and checked in advance with our technical staff.
The devices of the DG08 series should not be used as sole monitoring devices in order to
detect or even avoid dangerous operating states in plants and machines. The plant or
machine itself must be planned and constructed in such a way that critical conditions
which pose a danger to man and the environment are excluded from the outset
Dangerous substances
For dangerous media such as e.g. Oxygen, Acetylene, flammable or toxic substances as
well as refrigeration systems, compressors, etc. must comply with the relevant regulations
beyond the general rules.
Qualified Personnel
The devices of the DG08 may only be installed by trained, qualified personnel who are
able to mount the devices correctly. Qualified personnel are persons, who are familiar with
assembling, installation, placing in service and operating these devices and who are suit ably trained and qualified.
DG08 Instruction manual 04/2019 page 2
Inward Monitoring
Please check directly after delivery the device for any transport damages and deficiencies.
Additional with reference to the accompanying delivery note the number of parts must be
checked.
Claims for replacement or goods which relate to transport damage can only be considered
valid if the delivery company is notified without delay.
Functional description
The flow indicators of the DG08 series are used to monitor gaseous, liquid or aggressive
media. The medium enters the valve body and lifts the Teflon ball resting in the valve seat.
Maintenance and care
Due to the small number of moving parts, the units require very little maintenance. However, regular functional checks and maintenance not only increase the service life and
functional reliability of the device, but also that of the entire system.
The maintenance intervals depend on the contamination of the medium.
DG08 Instruction manual 04/2019 page 3
Flow Measurement and Monitoring
DG08
Ball-Type Flow Indicator
• for liquids and gases
• robust stainless steel design
• max. temperature 200 °C
max. pressure 16 bar
• for horizontal installation
• for nominal pipe sizes
from 1/4“ to 1 1/2“
Description:
The DG08 mechanical flow indicator is used for visual verifica tion of the flow of liquids or gases. The liquid or gas being
monitored lifts the PTFE ball from its valve seat. As the flow
increases, the ball in the domed sight glass becomes increasingly visible. These devices are made of high-quality materials,
allowing them to be used with a great variety of liquids or
gases.
Typical application:
DG08 mechanical flow indicators are used to monitor the flow
of liquid or gaseous media. These devices are especially
suited for use in industrial systems and for process monitoring
as well as for basic monitoring of compressors, ventilators,
fans and many other types of similar equipment.
PKP Process Instruments Inc.
10 Brent Drive Hudson, MA 01749
S +1-978-212-0006 • T +1-978-568-0060
info@pkp-usa.com • www.pkp-usa.com
PKP Prozessmesstechnik GmbH
Borsigstr. 24 • D-65205 Wiesbaden
S +49 (0) 6122-7055-0 • T +49 (0) 6122 7055-50
info@pkp.de • www.pkp.de
180724
Models:
Material: housing from stainless steel
Flow rates:
Ball /
initial movement
Ball /
fully visible
Connection
water
[l/min]
air
[l/min]
water
[l/min]
air
[l/min]
G 1/4
0,1 2,5 1 9
G 3/8
0,1 3 1 10
G 1/2
0,1 10 1 50
G 3 /4
2,4 60 5,2 100
G 1
2,7 75 5,5 100
G 1 1/4
11 100 16 180
G 1 1/2
16 110 21 180
Dimensions:
Connection
A [mm] B [mm] C [mm]
Weight
[kg]
G 1/4 76 63 79
0,72
G 3/8 76 63 79
0,69
G 1/2 76 63 79
0,65
G 3 /4 89 63 95
1,3
G 1 89 63 95
1,25
G 1 1/4 117 75 125
2,5
G 1 1/2 117 75 125
2,35
Order Code:
Order number: DG08.
Ball-type flow indicator
E. 10. 0
Material:
E = stainless steel
Connection:
08 = G ¼ female thread 08N = 1/4“ NPT
10 = G 3/8 female thread 10N = 3/8“ NPT
15 = G 1/2 female thread 15N = 1/2“ NPT
20 = G 3/4 female thread 20N = 3/4“ NPT
25 = G 1 female thread 25N = 1“ NPT
32 = G 1 1/4 female thread 32N = 1 1/4“ NPT
40 = G 1 1/2 female thread 40N = 1 1/2“ NPT
Options:
0 = without
1 = please specify in plain text
Technical Data:
Max. pressure: 16 bar
Max. mediatemperature: 200 °C
Materials:
Housing: stainless steel 1.4408, ASME 316,
ASTM - A - 351 CF8M
Housing cover: stainless steel
Sight class: borosilicate glass
Pins: stainless steel
Kugel: PTFE
O-Ring: FKM
Dichtung: Klingersil C-4400
(non-wetted part)
Installation
position: for horizontal installation only
Maximum flow velocity with liquids should not be more than
3 m/s.
PKP Process Instruments Inc.
10 Brent Drive Hudson, MA 01749
S +1-978-212-0006 • T +1-978-568-0060
info@pkp-usa.com • www.pkp-usa.com
PKP Prozessmesstechnik GmbH
Borsigstr. 24 • D-65205 Wiesbaden
S +49 (0) 6122-7055-0 • T +49 (0) 6122 7055-50
info@pkp.de • www.pkp.de
Flow
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