Explosion Proof Series

Positive Pressure Explosion Proof Cabinet & Isolated Explosion Proof

Note: All our equipment supports custom explosion proof series.

We provide complete industrial chiller design and manufacturing. From standard models to complete customized chiller systems up to 1000 tons. We specialize in customer service and are dedicated to helping each customer have the optimal air or water chiller system for their specific need.

We provide non-standard customized solutions. Both single cooling chillers and cooling & heating chillers are available.

Email Us: info@lneya.com Send WhatsApp: +86 17851209193

chiller

1. Chiller – FLTZ Frequency Conversion Series

Multiple temperature ranges available

The variable frequency pump can adjust the circulating fluid pressure and flow.

(Custom Designs)

Model	FLTZ-0	FLTZ-2	FLTZ-4	FLTZ-8	FLTZ-10
Temperature range	+5 ~ +90 °C	-25 ~ +90 °C	-45 ~ +90 °C	-80 ~ +90 °C	-100 ~ +90 °C
Cooling capacity	6 … 40 kW	2 … 15 kW	1 … 8 kW	0.6 … 3 kW	1.5 … 3 kW
Temperature stability	±0.05 ℃	±0.05 ℃	±0.05 ℃	±0.05 ℃	±0.05 ℃

chiller

2. Chiller – LTZ Frequency Conversion Series

Ultra-low temperature refrigeration technology, fast cooling speed

The variable frequency pump can adjust the circulating fluid pressure and flow.

(Custom Designs)

Model	LTZ-H	LTZ4	LTZ	LTZ2	LTZ4	LTZ6	LTZ8	LTZ10/11
Temperature range	+5 ~ +90 °C	-40 ~ +90 °C	+5 ~ +30 °C	-25 ~ +30 °C	-45 ~ +20 °C	-60 ~ -30 °C	-80 ~ -50 °C	-115 ~ -65 °C
Cooling capacity	4 … 20 kW	0.7 … 11.5 kW	23 … 300 kW	7 … 117.5 kW	2.85 … 61.56 kW	4.9 … 93.2 kW	3.7 … 78.5 kW	0.6 … 2.8 kW
Temperature stability	±0.3 ℃	±0.3 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	/

fltz-multi-channels-chiller

3. Chiller – Frequency Conversion Multi-channel Series

Multi-channel independent temperature control

Over two refrigeration methods for you to choose

(Custom Designs)

Model	FLTZ-203W-2T	FLTZ-406W/ETCU-015W	FLTZ-203W/ETCU-008W/FLTZ-203W	FLTZ-215W/ETCU-015W/ETCU-008W	FLTZ-2T
	2 channels	2 channels	3 channels	3 channels	2 systems
Temperature range	-20 ~ +90 °C -20 ~ +90 °C	-45 ~ +40 °C +10 ~ +80 °C	-10 ~ +60 °C +30 ~ +80 °C -10 ~ +80 °C	-20 ~ +50 °C +30 ~ +100 °C +30 ~ +40 °C	-20 ~ +90 °C -30 ~ +90 °C -45 ~ +90 °C
Cooling capacity	4 kW 4 kW	11 kW 13 kW	4 kW 6 kW 3 kW	15 kW 13 kW 8 kW	3 kW 5 kW 2.5 kW
Temperature stability	±0.1 ℃	±0.1 ℃	±0.1 ℃	±0.1 ℃	±0.1 ℃

zltz chiller

4. Chiller – ZLTZ Efficient Heat Exchange Series

Multiple temperature ranges available

The variable frequency pump can adjust the circulating fluid pressure and flow.

(Custom Designs)

Model	ZLTZ	ZLTZ3	ZLTZ6
Temperature range	-10 ~ +25 °C	-30 ~ +25 °C	-65 ~ -30 °C
Cooling capacity	5 … 16 kW	3 … 11 kW	2.6 … 8 kW
Temperature stability	±0.3 ℃	±0.3 ℃	±0.3 ℃

chiller

5. Chiller – LT Fixed Frequency Series

Ultra-low temperature refrigeration technology, fast cooling speed

The variable frequency pump can adjust the circulating fluid pressure and flow.

(Custom Designs)

Model	LT-800	LT	LT2	LT4	LT6	LT8
Temperature range	-18 ~ +30 °C	+10 ~ +30 °C	-25 ~ +30 °C	-45 ~ +30 °C	-60 ~ -30 °C	-80 ~ -40 °C
Cooling capacity	0.9 kW	3 … 14 kW	1.5 … 5 kW	0.7 … 4.8 kW	0.7 … 4.8 kW	0.4 … 2.5 kW
Temperature stability	/	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃

screw-chiller

6. Chiller – LTG Screw Chiller Series

Multiple temperature ranges available

Low carbon, energy saving and environmental protection

(Custom Designs)

Model	LG1	LG2	LG4	LG6	LG8	LG11
Temperature range	+5 ~ +30 °C	-25 ~ +5 °C	-45 ~ -10 °C	-60 ~ -10 °C	-80 ~ -30 °C	-110 ~ -50 °C
Cooling capacity	202.9 … 936 kW	68.8 … 318 kW	43 … 180 kW	56.7 … 238 kW	30.9 … 131 kW	7.7 … 32 kW

chiller

7. Chiller – LTZ-M Frequency Conversion Series

Temperature control for target product which already have cold storage tanks and circulation pumps

(Custom Designs)

Model	LTZ-M
Temperature range	+5 ~ +30 °C
Cooling capacity	3 … 87 kW
Temperature stability	±0.5 ℃

chiller

8. Chiller – LTZ-DI Deionized Water Series

Intelligently adjust the temperature and cooling capacity of the refrigeration system

Frequency conversion temperature control

(Custom Designs)

Model	LTZ-DI
Temperature range	+2 ~ +20 °C
Cooling capacity	5 … 25 kW
Temperature stability	±0.5 ℃

Cooling & Heating Machines down to -25°C

9. Chiller – SUNDI Cooling & Heating Combo Series

High-precision intelligent temperature control

Fully closed circulation system to reduce energy consumption

(Custom Designs)

Model	SUNDI-1 series	SUNDI-2 series	SUNDI-23 series	SUNDI-4 series	SUNDI-43 series	SUNDI-6 series	SUNDI-63 series	SUNDI-7 series	SUNDI-8 series	SUNDI-9 series	SUNDI-10 series
Temperature range	-10 ~ +150 °C	-25 ~ +200 °C	-25 ~ +300 °C	-45 ~ +250 °C	-45 ~ +300 °C	-60 ~ +250 °C	-60 ~ +300 °C	-70 ~ +250 °C	-80 ~ +250 °C	-90 ~ +250 °C	-100 ~ +100 °C
Cooling capacity	1.5 … 15 kW	1 … 200 kW	1 … 200 kW	0.45 … 200 kW	0.9 … 25 kW	0.25 … 60 kW	0.75 … 25 kW	0.4 … 15 kW	0.3 … 80 kW	0.2 … 80 kW	0.45 … 80 kW
Temperature stability	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃	±0.5 ℃

10. Chiller – Customized Solutions for your Project

We have designed OEM chillers for aerospace, automotive, defense, energy, chemical, industrial, medical, and semiconductor application, all delivered with capabilities specific to the demanding needs of our customers.

Don’t know how to choose a chiller?
Contact us now to get detailed chiller details and prices

Email: lilia@lneya.com WeChat ID: +8615251628237 WhatsApp: +86 17851209193

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We offer a variety of chiller types

We provide complete chillers design and manufacturing. From standard models to complete customized products.

We specialized in customer service and are dedicated to helping each customer have the optimal temperature control system for their specific need.


Low Temperature Chillers	Recirculating Chillers	Air Cooled Chillers	Water Cooled Chillers


Small/Mini Chillers	Glycol Chillers	Explosion Proof Chillers	Screw Chillers


Cooling & Heating Chillers	Portable Chillers	Process Chillers	Custom Chillers

Please contact us for the latest chiller catalog and prices

Email: lilia@lneya.com WeChat ID: +8615251628237 WhatsApp: +86 17851209193

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It is designed and examined according to the national standard GB3836.5-2004 Electrical equipments positive pressure”P” used in explosive gas environment. Can be widely used in petroleum, chemical industry, medicine etc. in which dangerous area with explosive gas and dust.

Ex-mark is ExpxdmbllCT4.

Certification: GYB091118

The PXK bring the clean and security of compressed air in positive pressure cavity by intelligent control system matching pressure control system of explosion-proof control box and to be a micro-positive pressure to prevent the dangerous gases, dust in,which reached to the purpose of explosion-proof. This product with the function of intelligent centralized control, LCD text display, automatic ventilation, automatic delay power-up, air supply for pressure loss, fault alarm and automatically cut off power supply in danger, etc

Structure Description

Positive pressure cabinet is composed of positive pressure cavity and control cavity;Positive pressure cavity is used for installing various of instrument or electronics which with non-explosion-proof.The control cavity has explosion-proof control box and pressure control system.The case material of positive pressure cabinet with 2~3mm Cold rolled steel sheet welding and the Air-duct with galvanized steel pipe;Adopt bulkhead connector and tightening device for in&out of the cable.There is a glass display in the front of door and display the information of instrument and indicator light.

Safety Instruction

1. PXK value >280Pa,Automatic vent

2. 50pa <PXK value <80pa, automatic alarm

3. PXK value<50Pa,Automatically power off

Operation Principle

The operation principle please refer to picture

Please press the “Start Button” after outside voltage 220V AC in explosion-proof control box; Open air-intake casing by magnetic valve 4 excitation, the compressed air come into the positive pressure cavity by filtering and decompression;the dangerous gas of positive pressure cavity is discharged by exhaust valve 8;When the dangerous gas of positive pressure cavity reached to safety value,the ventilation will be finished as well as interlocking contact closed automatically.In that case,electric appliance& instrument in positive pressure cavity can start to work.

The adjustment for positive pressure values

Adjust the bottom of positive pressure value regulating handle of one-way throttle valve,PXK value will be higher by Clockwise,on the contrary,be lower.It is reasonable to adjust the PXK value to be 250Pa,if the pressure is low and can not be reached to this fine pressure,please kindly check whether the air inlet valve is open totally or not,and if the positive pressure chamber is sealed with the outside and so on.

Interlock Function Selection

PXK used in the dangerous area 1,if PXK value<50Pa,interlocking contact must be off;If operating in the dangerous area 2, PXK value < 50Pa, interlocking contact can be open;But you must deal with in time and ensure the pressure > 50Pa, this function by DIP SWITCH U2 the 3rd to adjust,which in the condition of up interlocking contact off, below interlocking contact do not disconnect and to operate in off-state.

PXK Constant-temperature Cooling System

It auto controls the cooling water into the internal heat exchanger of system to take the heat of PXK away. It can make sure the internal system in the situation of constant-temperature and keep every part safe.

Isolated explosion proof (EXdIIBT4)

1. Electrical cabinet (adopt Isolated explosion proof )
A. Separate wiring chamber.
B. Heating power >7.5KW, with independent heat dissipation aluminum fins explosion-proof cabinet.
C. Electric cabinet adopts whole aluminum mold.
D. Equipped with explosion-proof mouse, to operate 7-inch touch screen (optional Siemens explosion-proof touch screen – 7 inch, 12 inch).

2. Compressor
A. Using isolated explosion proof.
B. Adopt Terminal block packaging process (Intrinsically safe)

3. Circulating fan
A. Using isolated explosion proof
B. Aluminum fin

4. Circulating pump adopts isolated explosion proof motor

5. Heater adopts flameproof type (heating power per unit area<3W)

6. Temp. sensor adopts flameproof type

7. Pressure sensor adopts flameproof type

8. Various protection areas are installed in flameproof boxes