Basic Info.
Number of Switch
Single Control Switch
Structure
Amplifier Built-in Type
Explosion-proof Type
Non Explosion-proof
Contact Type
Type a Contact
Detection Method
Retro-reflective Mode
Working Viscosity
<1X10-3m2/S
Switching Elements
Microswitches
Ambient Temperature
-25º C~55º C
Medium Temperature
-25º C~80º C
Anti-Vibration
Max. 100m/S2
Repeatablity Error
< 2.5%Fs
Electrical Rating
AC 220V, 6A
Transport Package
Inner Box, Carton
Product Description
YWK-7DD Differential Pressure SwitchesThe sensor of this Switch is a Diaphragm-Piston combination, it can endure High Static Pressure, and can be
suitable for air, gas and neutral gas, lubricant, light fuel etc. Fluid medium. The differential pressure of the
switches is adjustable, and its adjustable range is from 70Kpa to 300Kpa. With its compact structure, it is
specially suitable for field which is critical on the mounting space.
Dead Band Non-Adjustable |
Differential Pressure Set Point Adjustable Range (kPa) | Dead Band No Greater Than (Kpa) | Max.Allowable Pressure | Material of Sensor | Connection (M) |
Shell | Diaphragm | Piston |
70~170 | 50 | 3.5 | LY 12 Alloy Aluminum | Nitrile Rubber | Steel | M18*1.5/ M16*1.5 |
120~300 | 80 |
Characteristic: Good anti-vibration, microminiature design, High switching frequence (100 times/min. )
The Adjustment for Set Point(please refer to the Set-point Adjustment for Pressure Switches)
In-put the Hi-Pressure source at the H port, and In-put the Lo-pressure source at the L port.
Example: Choose Differential Pressure Adjustable Range from 70 to 170Kpa Switch, an alarm need to be
generated when Differential Pressure rises to 120Kpa( the Increasing Set Point), specific steps please refer to
followings:
1) Screw the Hi-Pressure port of the switch onto the Test-bench, and connect the plug with the source.
2) Add the pressure to 120Kpa, this value can be read from a standarded gauge.
3) Use the Socket Head Screw spanner (M2) to regulate the Set Point nut which is inside the Lo-Pressure
connection (clockwise rotate the nut, the value will become larger; Countrarotate the nut, the value will become
smaller)
4)Varing the pressure up and down arround 120 Kpa, to check if it switches at 120Kpa, this is just the
Increasing Set Point, its correspondent Decreasing Set Point is 120Kpa minus Dead Band (approximately
30Kpa), to be 90Kpa(approximately)
(If the user do not have correspending tools, then this step can be canceled. )
Selection and Installation (Please refer to the selection and Installation of Switches)
The Set Point must be within the aAdjustable Range, Dead Band is expressed as Typical at mid-range. Normally
it is the 20% to80% of the Ajustable Range.
The On-Off current should not exceed the Rating (when the contacts act frequently, the current better not to
exceed the 60% of the Rating. )
If the switches are outdoor application, sufficient protections are necessary, for the severe variation of the
ambient temperature, radiation of the sunlight, permeation of the corrosive gas or water, will influence the life of
the switches.
Regarding those controlled fluid medium with peak value of pressure and plusation pressure, a damper can be
installed at the connection, to eliminate negative influence
During the process of installation or disassembly, a spanner MUST be used to clip and tighten the connection
part of the sensor, to prevent the housing and the Hi-pressure &Lo-pressure connections become flexible.
Please earthen the plug reliably.
Do not oppositely connect the Hi-pressure and Lo-pressure port, otherwise it would not work.
Address:
Guohe Industrial Park, Menghe Town, Xinbei District, Changzhou, Jiangsu, China
Business Type:
Manufacturer/Factory
Business Range:
Electrical & Electronics, Industrial Equipment & Components, Instruments & Meters
Company Introduction:
Changzhou Tianli Controller Manufacturing Co., Ltd.Is a ISO9001:2000 proved high-Tech.Enterprise.We are professional in manufacturing products includes:Pressure/Differential Transmitters, Indicating Pressure Switches, Two-level Pressure Switches, Stainless Pressure Gauges, Shakeproof Pressure Gauge, etc.We serve a countrywide market of oil and gas, chemical, petrochemical, chemical fiber, power industries, metallurgy, medical, light industry, telecommunication industries and Self-check & Control center of refregrating equipment, Self-alarm in process application and protection.Our brand "Tianxiang" is recogonized as high accuracy, High quality, reliability and varietal of specifications by the customers.
Since the company was founded in 1984, Tianli′s dedicated in producing high quality products, continually technical innovation.Our typical products could normally meets your requirements, meanwhile, we have ability in designing customized.We purse a Customer-oriented service philosophy.We make it our business to continuously improve our service and product strategies to be responsive to customer requirements.
We sincerely hope to cooperate users and friends worldwide, please feel wecome to call us or send e-mail to us.