HITROL HM-95 Series User manual

HM-95 Series
HITROL CO., LTD. 1
HITROL CO., LTD.
HEAD OFFICE.FACTORY. R & D INSTITUTE
HITROL CO., LTD.
141, Palhakgol-gil, Jori-eup
Paju-si, Gyeonggi-do, Korea
TEL.: [phone]
FAX: [phone]
www.hitrol.com
INSTRUCTION MANUAL
Float Type Level Switch
HM-95 Series
Doc. no.: HM95_IM_Eng_Rev.1
Issue date: 2020.03

HM-95 Series
HITROL CO., LTD. 2
Table of Contents
Overview · · · ·· · · · · · · · · · · · · · · · · · · · 3
Features · · · · · · · · · · · · · · · · · · · · · · · · 3
Applications · · · · · · · · · · · · · · · · · · · · · 3
Mechanism and Components · · · ·· · · · · · · · 3
SWITCH ACTION · · · · · · ·· · · · · · · · · · · · 4
HM-95 Series · · · · · · ·· · · · · · · · · · · · · · · · 4
HM-95V Series · · · · · ·· · · · · · · · · · · · · · · · 4
Technical Specifications · · · · · · · · · · · · · · 5
Weatherproof · · · · · · · · ·· · · · · · · · · · · · · 5
Ex-PROOF · · · · · · · · · · · · · · · · · · · · · · · · 5
Components · · · · · · · · ·· · · · · · · · · · · · 6–7
HM-95 Series · · · · · · · · · · · · · · · · · · · · · · 6
HM-95V Series · · · · · · · · · · · · · · · · · · · · · 7
Dimensions and Detailed Technical Specifications
· · · · · · · · · · · · · · · · · · · · · · · · · · · · ·8–10
Housing · · · · · · · · · · · · · · · · · · · · · · · · · 8
Float · · · · · · · · · · · · · · · · · · · · · · · · · · · 8
HM-95 Series · · · · · · · · · · · · · · · · · · · · · · 9
HM-95V Series · · · · · · · · · · · · · · · · · · · · · 10
Switch Specifications by Process Temperature 11
Wiring · · · · · · · · · · · · · · · · · · · · · · 11–12
HM-95 Series · · · · · · · · · · · · · · · · · · · · · · 11
HM-95V Series · · · · · · · · · · · · · · · · · · · · · 12
Installation · · · · · · · · · · · · · · · · · · · · 12–13
Maintenance · · · · · · · · · · · · · · · · · · · · ·· · · · 13
Failure Check · · · · · · · · · ·· · · · · · · · · · · · · · 14
Cautions for Removal · · · · · · · · · · · · · · · · · · ·14
Cautions for Transportation and Assembly · · · · 14
Cautions for Installation · · · · · · · · · · · · · · · · ·14
Cautions for Grounding · · · · · · · · · · · · · · · · 14
Cautions for Inserted External Wire · · · · · · · · 15
Safety and Environment · · · · · · · · · · · · · · · · 15
Label · · · · · · · · · · · · · · · · · · · · · · · · · · · 15
Labelling · · · · · · · · · · · · · · · · · · · · · · · · · · · 15
User Training· · · · · · · · · · · · · · · · · · · · · 16
Warranty and Contact· · · · · · · · · · · · · · ·· · · 16
Warranty & Service · · · · · · · · · · · · · · · · · · · · · · · · 16
Headquarters · Factory · Research Center (Contact) · · · · · · · · · ·
· · · · · · · · 16

HM-95 Series
HITROL CO., LTD. 3
Overview
Features
Applications
Mechanism and
Components
■ Solid structure and long service life
■ Applicable in high temperature and pressure
■ Current operation state display
■ Customizable with special material (alloy)
■ Pressure-resistant and ex-proof type available (HM-95-Ex, HM-95H-Ex, HM-95V-Ex, and HM-95VH-Ex)
■ ASME B31.1, ASME B31.3 (If chamber design is required.)
The HM-95 Series is a level detector used to detect high and low with ON and OFF contacts. With
its solid structure and high reliability, it is designed to be used with high temperature and
pressure. It is mainly used for boilers of power plants and refining equipment of petrochemical
plants.
When the level of the object to be measured rises, the float also rises due to buoyancy and,
accordingly, the connected core also rises. When the core rises, a switch block magnet responds to
the core so as to trigger the switch.
Core
Base
Cooling Fin
(For high temp.)
Cover
Enclosing Tube
Socket
Cage
Float
Pivot
Switch Block
■ Feedwater heaters ■ Steam drums
■ Condensate drip Pot ■ Flash tank
■ Separators ■ Receivers
■ Accumulator

HM-95 Series
HITROL CO., LTD. 4
SWITCH ACTION
HM-95 Series
HM-95V Series
RISING LEVEL
Core
Micro switch
Magnet
When the level of the object to be measured rises, the core also rises and switch block
magnet responds to the core so as to trigger the switch.
Enclosing Tube
When the level of the object to be measured is lowered, the core rises and the switch
block magnet responds to the core so as to trigger the switch.

HM-95 Series
HITROL CO., LTD. 5
Technical Specifications Weatherproof
Ex-Proof
※ The housing is designed to avoid damage from dust or water, and if necessary, anti-
corrosion housing (EPOXY Coated) can be selected.
Model
HM-95
HM-95H
HM-95V
HM-95VH
Process Connection
100A JIS 10K RF, Others
1'' Socket, Others
Ambient Temperature
-20°C to +80°C
Max. Process Temp.
-40℃ to +120℃
-40℃to +200℃
-40℃ to +350℃
-40℃ to +500℃
-40℃ to +120℃
-40℃ to +200℃
-40℃ to +350℃
-40℃ to +500℃
Max. Process Pressure
Up to 63 kg/cm2(900#)
Up to 105 kg/cm2(1,500#)
Switch Type
Micro switch, Hermetical Sealed (Opt.)
Contact Form
SPDT, DPDT
Enclosure
Weatherproof (IP65)
Material
Float
316L
Cage
Opt.
C.S, 304, 316 L, Others
Housing; Cable Entry
C.S; PF 3/4'' (F), AL.; PF 3/4'' (F), Others
Installation
Top
Top and Bottom, Side to Side
Model
HM-95-Ex
HM-95H-Ex
HM-95V-Ex
HM-95VH-Ex
Process Connection
100A JIS 10K RF, Others
1'' Socket, Others
Ambient Temperature
-20°C to +80°C
Max. Process Temp.
-40℃ to +12
0℃
-40℃ to +200℃
-40℃ to +300℃
-40℃ to +350℃
-40℃ to +120℃
-40℃ to +200℃
-40℃ to +300℃
-40℃ to +350℃
Max. Process Pressure
Up to 63 kg/cm2(900#)
Up to 105 kg/cm2(1,500#)
Switch Type
Micro switch, Hermetical Sealed (Opt.)
Contact Form
SPDT, DPDT
Enclosure
Ex-Proof (Ex d IIC T4, IP65)
Material
Float
316 L
Cage
Opt.
C.S, 304, 31 6L, Others
Housing; Cable Entry
AL.; PF 3/4'' (F), Others
Installation
Top
Top and Bottom, Side to Side

HM-95 Series
HITROL CO., LTD. 6
omponents
HM-95 Series
Carbon Steel Housing (Weatherproof)
Carbon Steel Housing + Terminal Box (Weatherproof)
Drain Parts
Wetted Parts
Aluminum Housing (Weatherproof, Ex-Proof)
Aluminum Housing + Terminal Box (Weatherproof)
Float
Cage
Cage
Flange
Flange
Flange
Ball Valve
Plug
Gate Valve
Globe Valve
Float
<Standard>
<Side to Bottom>
<Side to Side>
Cover
Base
Cooling Fin
Socket
Socket
Process Conn.
Flange
Float
Terminal Box
Cover
Base
Cooling Fin
Cover
Base
Terminal Box
Cooling Fin

HM-95 Series
HITROL CO., LTD. 7
HM-95V Series
Float
Socket
Cage
Drain Valve
Tee
Elbow
Socket
Vent Valve
Double Vent
Valve
Aluminum Housing (Weatherproof, Ex-Proof)
Aluminum Housing + Terminal Box (Weatherproof)
Carbon Steel Housing (Weatherproof)
Carbon Steel Housing + Terminal Box (Weatherproof)
Wetted Parts
Plug
Double Drain
Valve
Terminal Box
Cover
Base
Cooling Fin
Cover
Base
Terminal Box
Cooling Fin

HM-95 Series
HITROL CO., LTD. 8
Dimensions and Detailed Technical Specifications
Float Size
Minimum Specific Gravity
Ø94
0.8
Ø114
0.5
Float Size
Minimum Specific Gravity
Ø94
0.8
Carbon Steel Housing (Weatherproof)
Float
HM-95 Series
HM-95V Series
Aluminum Housing (Weatherproof)
Aluminum Housing (Ex-Proof)
※ Based on pressure of 10 kgf/cm2, temperature of 120°C, Standard length.
~120℃
~200℃
~350℃
~500℃
~120℃
~200℃
~350℃
~500℃
~120℃
~200℃
~300℃
~350℃

HM-95 Series
HITROL CO., LTD. 9
* Unit of length is mm.
HM-95 Series
HM-95H (-Ex)
HM-95H
HM-95 (-Ex)
HM-95
HM-95BH(-Ex)
HM-95BH
HM-95B(-Ex)
HM-95B

HM-95 Series
HITROL CO., LTD. 10
* Unit of length is mm.
HM-95V Series
HM-95V (-Ex)
HM-95VH (-Ex)
HM-95VH
HM-95V

HM-95 Series
HITROL CO., LTD. 11
Switch Specifications
by Process Temperature
Wiring
Process Temp.
AC 250V, 15A
DC 125V, 0.5
A
■~200℃
■~350℃
■~500℃
Contact Rating
■Open the cover and insert the cable into the inlet.
■Connect the cable with COM, N.O, N.C terminal of the switch block as necessary.
COMMON (COM)
Close on High Level (N.O)
Close on Low Level (N.C)
COMMON (COM)
Close on High Level (N.O)
Close on Low Level (N.C)
DPDT Wiring
SPDT Wiring
COMMON (COM)
Close on High Level (N.O)
Close on Low Level (N.C)
AC 250V, 5A
DC 125V, 0.5
A
+ Terminal Box
AC 250V, 1A
DC 125V, 0.4
A
HM-95 Series
Opt. Type
Std. Type
Opt. Type
Std. Type
Contact Rating
Specifications of Temperature and Contact Form (SPDT, DPDT) are optional.
Process Temp.

HM-95 Series
HITROL CO., LTD. 12
Installation
Default connection is Top type, but it is customizable to Side to Side or Side to Bottom.
According to the dimensions of the drawing, the connection and main unit must be leveled.
Also, it is recommended to install a bracket to support the product if necessary.
Vessel
Isolation
Valve
Isolation
Valve
Vessel
HM-95
HM-95V
COMMON (COM)
Close on Low Level (N.O)
Close on High Level (N.C)
COMMON (COM)
Close on Low Level (N.O)
Close on High Level (N.C)
DPDT Wiring
SPDT Wiring
COMMON (COM)
Close on Low Level (N.O)
Close on High Level (N.C)
300–600
300–600
HM-95V Series

HM-95 Series
HITROL CO., LTD. 13
Maintenance
Do not insulate the housing and heat sink.
Regular inspection helps in using the product in the optimal condition. As such, it
is recommended to conduct annual inspection and maintenance.
■ Cage
The cage is designed to endure high temperature and pressure, and its safety i
s confirmed with nondestructive and water-pressure tests. However, corrosion ca
n lead to leakage in a harsh working environment. As such, regular visual insp
ection and test are required.
■ Housing
Check the sealing of the housing cover and wire inlet to prevent dust or rain f
rom penetrating. Also, replace the sealing if it is old or damaged.
Exposure to excessive heat or humidity may damage the wire inlet insulation. It
may lead to short circuit, so check the wiring and replace it if necessary in a
dvance.
If the terminal is not tightened, vibration may cause it to loosen.
Prepare a spare switch block so that the process can continue even if there is
a problem with the switch block.
The product can be removed from the vessel to check the contact of level swit
ch using liquid (e.g., water) and then reconfigure it.
For maintenance, check for the presence of the object to be measured
in the tank first.
Learn how to adjust the switch block before adjusting it, and contact
the headquarters or dealership for any replacement required.
If the temperature of object to be measured exceeds 350℃, an ex-proof product (HM-95-Ex
and HM-95V-Ex) is not applicable.
If the temperature of object to be measured exceeds 120℃, use a high-temperature product
(HM-95H, HM-95VH) and insulate the main unit and connection, as shown below.

HM-95 Series
HITROL CO., LTD. 14
Failure Check
Cautions for
Removal
Transportation and
Cautions for
Assembly
Cautions for
Installation
Cautions for
Grounding
If there is a problem with operation, check the following first.
■ Remove the cover and check if the output of the micro switch works fine.
Connect a tester to COM and NO or NC to check the output, and if there is a problem,
replace the micro switch.
■ After checking the micro switch, remove the product from the vessel and move the float
up and down to see if the switch block magnet responds to the core.
■ Recheck if the float and level of object to be measured are leveled.
■ Recheck if the float is positioned on top of the object to be measured.
■ Pay special attention to prevent any impact on the product during transport or assembly.
The impact may directly lead to a failure.
■ When attaching the product to a vessel, pay attention to prevent any damage to the assembly
packings.
■ Check the level and presence of object to be measured in the vessel before removing it.
■ The product may be overheated so wear gloves to prevent burns.
■ If there is explosive gas in the atmosphere, do not open the cover.
■ Make sure that any O-ring or gasket is not damaged while opening or closing the cover.
■ To remove the cover of an ex-proof product, release the lock key first.
■ Use the same standard flange or screws.
■ Make sure to insert washers between bolts and nuts to prevent loosening.
■ Make sure to insert gaskets between flanges.
(Select the gaskets in consideration of the temperature of the content and the pressure of the
container.)
■ Install an ex-proof product in an ex-proof zone.
Make sure that the product would not be subject to any high impact during transport
or assembly.
External ground is located on top of the cable entry, and the grounding wire to connect e
xternal ground must be 4 mm2(4 mm SQ). (Internal ground is connected before shipment.)
Make sure to insert a washer if the terminal lug is removed from the
ground terminal and then reconnected (to prevent loosening).

HM-95 Series
HITROL CO., LTD. 15
Cautions for
Inserted External
Wire
(Ex-Proof Product)
Safety and Environment
Label
■ Cautions for Use
- Make sure to connect the product and container using the required tools.
- Store the key safely and make sure that it is locked.
- Do not apply high impact to the product.
■ Cautions for Wiring
- Make sure to correctly connect the contacts.
- Pay attention to prevent electric shocks.
■ Disposal
- Make sure to separate the micro switch of a switch block from the
housing before wasting the product.
No part affects the environment so no special attention is required
(e.g., mercury switch).
■ Use the cable gland connection or metal pipe line lead-in on the wire inlet,
and use a product with an equivalent ex-proof certificate to connect it using the
external line lead-in method.
■ For an unused external line inlet, use a closing plug with an equivalent ex-proof certificate.
■ Label
The label is attached on the housing to state the model, serial number, working
temperature, working pressure, and output. The serial number is a unique
manufacturing number.
Weatherproof Version
Ex-Proof Version

HM-95 Series
HITROL CO., LTD. 16
User Training
Warranty
and Contact
Warranty and Service
This product is subject to a two-year warranty upon shipment and free service
will be provided for any damage found under normal operating conditions. If tro
ubles that occur are not due to product failure, service charge will apply.
You can request A/S from our website or by contacting our headquarters.
Headquarters, Factory, and Research Center (Contacts)
Address: Hitrol, 141, Palhakgol-gil, Jori-eup, Paju-si, Gyeonggi-do, Republic of Korea
(Palhakgol-gil 98)
HITROL CO., LTD. 141, Palhakgol-gil, Jori-eup, Paju-si, Gyeonggi-do, Korea
TEL.: [phone] (Headquarters and A/S)
FAX: [phone] (Headquarters and A/S)
Do not apply a Non-ex-proof product in an Ex-proof zone.
An ex-proof product can be used where the environment and liquid inside the co
ntainers are of zone 1 and 2.
Read and understand the aforementioned and make sure that the temperature of
the object to be measured does not exceed 120℃ for general purpose, or 500℃
for high temperatures. For an ex-proof type, the maximum is 350℃. In addition,
make sure that the ambient temperature of the housing is kept at -20 –+80℃.
Ensure that a high-temperature cable is used for high-temperature products
(to prevent cable damage).
An ex-proof product is a pressure-resistance and ex-proof type, so do not open
the cover while using it.
Ex-proof products are designed according to Article 34 of the Industrial Safety and Healt
h Act and Article 58.4 of the Enforcement Rules of the same Act.