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.2.1
Issue date : 2021. 06

HM-95 Series
HITROL CO., LTD. 2
You shall be well-informed of the contents
where WARNING is marked before carrying
out the work.
.
You shall be aware of where NOTICE is
marked to carry out the work.
You shall be careful where CAUTION is
marked to carry out the work.
Table of contents
Maintenance ······················13
Failure Check ·······················14
Precautions for Removal ···············14
Precautions for Transportation and Assembly ··
································14
Precautions for Installation ·············14
Precautions for Grounding ·············14
Precautions for Inserted External Wire (Ex-proof)··
···························14
Safety and Environment ···············15
Marking ·························15
User Training ··················16
Warranty and Contact ···············16
Overview ······················3
Characteristics ······················3
Applications ····················3
Operating Principles ················3
Switch Action ····················4
HM-95 Series ····················4
HM-95V Series ····················4
Specifications ····················5
Weather-proof ···················5
Ex-proof ·······················5
Product Components ···············6
HM-95 Series ····················6
HM-95V Series ····················7
Dimensions & Technical Specifications ····8
Housing ························8
Float ···························8
HM-95 Series ·····················9
HM-95V Series ···················10
Switch Specification by Process Temperature ··
·····························11
Wiring ···················11
HM-95 Series ···················11
HM-95V Series ····················12
Installation ··················12

HM-95 Series
HITROL CO., LTD. 3
Overview
Characteristics
Applications
Operating
Principles
■ 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.)
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.
■ Feedwater heaters ■ Steam drums
■ Condensate drip Pot ■ Flash tank
■ Separators ■ Receivers
■ Accumulator
Enclosing Tube
Core
Base
Cover
Socket
Cage
Float
Pivot
Switch Block
Cooling Fin
(For high temp.)

HM-95 Series
HITROL CO., LTD. 4
Switch Action
RISING LEVEL
Core
Micro switch
Magnet
Enclosing Tube
RISING LEVEL
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.
HM-95 Series
When the level of the medium goes up, the core falls, and the switch block magnet
responds to the core so as to trigger the switch.
HM-95V Series

HM-95 Series
HITROL CO., LTD. 5
Specifications
Weather-proof
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℃to +80℃
Max. Process Temp.
-40℃~ +120℃
-40℃~ +200℃
-40℃~ +350℃
-40℃~ +500℃
-40℃~ +120℃
-40℃~ +200℃
-40℃~ +350℃
-40℃~ +500℃
Max. Process Pressure
Up to 63 kg/cm2(900#)
Up to 105 kg/cm2(1500#)
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℃~ +120℃
-40℃~ +200℃
-40℃~ +300℃
-40℃~ +350℃
-40℃~ +120℃
-40℃~ +200℃
-40℃~ +300℃
-40℃~ +350℃
Max. Process Pressure
Up to 63 kg/cm2(900#)
Up to 105 kg/cm2(1500#)
Switch Type
Micro Switch, Hermetical Sealed (Opt.)
Contact Form
SPDT, DPDT
Enclosure
Ex-Proof (Ex d IIC T4, IP65)
Material
Float
316L
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
Product Components
HM-95 Series
Carbon steel Housing (Weather-Proof)
Carbon steel Housing + Terminal Box (Weather-Proo
f)
Drain Parts
Wetted Parts
Aluminum Housing (Weather-Proof, Ex-Proof)
Aluminum Housing + Terminal Box (Weather-Proof)
Ball Valve
Plug
Gate Valve
Globe Valve
Float
Cage
Cage
Flange
Flange
Float
Flange
<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 (Weather-Proof, Ex-Proof)
Aluminum Housing + Terminal Box (Weather-Proof)
Carbon steel Housing (Weather-Proof)
Carbon steel Housing + Terminal Box (Weather-Pro
of)
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 & Technical Specifications
Float Size
Minimum Specific Gravity
Ø90
0.8
Ø110
0.5
Float Size
Minimum Specific Gravity
Ø90
0.8
Carbon steel Housing (Weather-Proof)
Float
HM-95 Series
HM-95V Series
~120℃
~200℃
~350℃/~500℃
/
~500℃
Aluminum Housing (Weather-Proo
f)
~120℃
~200℃
~350℃/~500℃
/
~500℃
Aluminum Housing (Ex-Proof)
~120℃
~200℃
~300℃
~350℃
※Based on pressure of 10kgf/cm2, temperature of 120°C, Standard length.
※Unit of Length: [mm]
Some tolerances may occur with actual products.
If the fluid temperature is over 200°C, heat resistance cables for high temperatures shall be applied.

HM-95 Series
HITROL CO., LTD. 9
HM-95H(-Ex)
HM-95H
HM-95(-Ex)
HM-95
HM-95BH(-Ex)
HM-95BH
HM-95B(-Ex)
HM-95B
HM-95 Series
※Unit of Length: [mm]
Some tolerances may occur with actual products.

HM-95 Series
HITROL CO., LTD. 10
HM-95V Serie
s
HM-95V(-Ex)
HM-95VH(-Ex)
HM-95VH
HM-95V
※Unit of Length: [mm]
Some tolerances may occur with actual products.

HM-95 Series
HITROL CO., LTD. 11
Specifications of Temperature and Contact Form (SPDT, DPDT) are optional.
Switch Specification by
Process Temperature
Std. Type
Opt. Type
Process
Temp.
Contact Rating
~ 200˚C
AC 250V, 15A
DC 125V, 0.5A
~ 350˚C
AC 250V, 5A
DC 125V, 0.5A
Std. Type
Opt. Type
Process
Temp.
Contact Rating
+ External Terminal Box
~ 500˚C
AC 250V, 1A
DC 125V, 0.4A
Wiring
■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.
HM-95 Series
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)
Common (COM)
Close on High Level (N.O)
Close on Low Level (N.C)
■DPDT Wiring
■SPDT Wiring

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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 shall 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 High Level (N.O)
Close on Low Level (N.C)
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)
300~600
300~600
■DPDT Wiring
HM-95V Series
■SPDT Wiring

HM-95 Series
HITROL CO., LTD. 13
Do not insulate the housing and cooling fin.
Maintenance
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 is
confirmed with nondestructive and water-pressure tests. However, corrosion can
lead to leakage in a harsh working environment. As such, regular visual inspection
and test are required.
■ Housing
Check the sealing of the housing cover and wire inlet to prevent dust or rain from
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 advance.
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 switch
using liquid (e.g., water) and then reconfigure it.
- 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(-Ex), HM-95VH(-Ex)) and insulate the main unit and connection, as
shown below.
For maintenance, check the presence of measure object in the tank and remove it.
Learn how to adjust the switch block first, and contact the headquarters or
dealership for any replacement required.

HM-95 Series
HITROL CO., LTD. 14
Make sure that it is not subject to any high impact when moving the product.
Failure Check
Precautions
for Removal
Precautions
for
Transportation
and Assembly
Precautions
for Installation
Precautions
for Grounding
Precautions
for
Inserted
External Wire
(Ex-proof)
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 N.O or N.C 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 device during transportation or
assembly.
■Pay attention to prevent any damage to any packing when transporting or
mounting the machine to the vessel.
■Use the cable gland connection or metal pipe line lead-in on the wire inlet, and use
a product with equivalent Ex-proof certificate to connect it with the external line
lead-in method.
■For non-use external wire inlet, use a closed plug that passes safety certificate
above equivalent performance with the product.
■Check the level and presence of measure object in the tank before removing it.
■Wear gloves when removing it, to prevent a burn.
■Make sure that any O-ring or gasket is not damaged while opening or closing
the cover of product.
■Unlock the lock key before removing the cover.
■Disconnect the cable before removing the snap switch.
■Use the same standard flange or screw.
■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
temperature of content and pressure of vessel.)
■Install an Ex-proof product only in an Ex-proof zone.
■External ground is located on top of cable entry, and the grounding wire to connect
external ground must be 4 ㎟(4mmSQ). (Internal ground is connected before
shipment.)
If there is explosive gas atmosphere, do not open the cover.
Make sure to insert a washer if the terminal lug is removed from the ground
terminal and then re-connected. (Loosening prevention)

HM-95 Series
HITROL CO., LTD. 15
Safety and
Environment
Marking
■Precautions for Use
- Make sure to connect the product and vessel using required tools for sure.
- Keep the lock key safe and make sure that it is locked.
- Do not apply high impact to the product.
■Precautions for Wiring
- Make sure to wire contacts correctly.
- Pay attention to prevent electric shock.
■Disposal of Product
- Remove the snap switch of switch block from the housing before disposing a
product.
- No part (ex. Mercury Switch) has influence on the environment, so no special
attention is required.
■Product Identification
The product identification mark is attached onto the housing and shows the product
name, serial number, working temperature, working pressure, and matters regarding
output. The serial number is a unique manufacturing number for the identification of
products.
Weather-Proof Version
(C.S + Aluminum Housing)
Weather-Proof Version
(Aluminum Housing)
Ex-Proof Version
(Certification No.: 09-AV2BO-0097)

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HITROL CO., LTD. 16
■Warranty and Service
This product is subject to the warranty for 2 years of shipment and unpaid service will
be provided for any damage found under normal operating conditions. If it is not about
the failure of product, the service charge will be payable.
You can request A/S at our website or by contacting our headquarters.
■Headquarters ․Factory ․Laboratory Contact Number
ADDRESS: HITROL CO., LTD 141, Palhakgol-gil, Jori-eup, Paju-si, Gyeonggi-do, Korea
T E L : 031-950-9700 (Headquarters & A/S)
F A X : 031-943-5600 (Headquarters & A/S)
Understand the aforementioned and do not exceed 120℃ and 500℃ respectively for the
liquid in the general and high-temperature vessels to use the product. In addition, make
sure that the ambient temperature of housing is kept at -20 - +80℃. (However, Ex-Proof
product is limited to a maximum temperature of 350℃for the liquid in the container.)
Make sure to use high-temperature cables with high-temperature products.(To prevent
damage to the cable). An Ex-proof product is a pressure-resistant and Ex-proof type, so
never open the cover during operation. Ex-proof products are designed according to
Article 34 of the Industrial Safety and Health Act and Article 58.4 of the Enforcement
Rules of the same Act.
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
containers are of zone 1 and 2.
User
Training
Warranty
and Contact