High Temperature High Pressure Digester for Cod/Tp/Tn Environmental Water Analyzer

• Media: Water,Strong Acids and Alkalis, Corrosive Solvents
• Temperature: High Temperature
• Actuator: Electric
• Connection Form: 1/4-28 Unf,M6
• Type: Direct Acting
• Material: PVDF,PTFE,Aluminum Housing
• Model NO.: 6212-22-FFU/5NC85
• Pressure: 0.3-1.5MPa
• Valve Structure: Direct Action Diaphragm Structure
• Power Supply: DC Solenoid Valve
• Usage: Flow Control
• Standard: GB
• Application: Industrial Usage, Water Industrial Usage, Water Quality Online Analyzer
• Voltage: 24V
• Application Industry: Cod,Toc,Tp,Tn,Nh3 Environmental Equipment
• Orifice: 1.3mm
• Consumption Power: 5.2W
• Operate Pressure (in-out): 0.3MPa-1.5MPa
• Response Time: <30ms
• Transport Package: Bulk Package
• Specification: CE, RoHS
• Trademark: Keyto
• Origin: China
• HS Code: 8481804090
• Production Capacity: 1000, 000 PCS/Year

Product Description

1 Production Overview
6X12-2 series digestion module is a 1.3mm diameter integrated digestion module independently developed by Keyto. Its main function is to realize the on-off of the liquid circuit, resistance to strong acid and alkali corrosion, high temperature and high pressure. The digestion valve components are available in 3Kg, 8Kg and 15Kg models, can withstand different reagents under different working conditions, and have an action life of more than 2 million times. It is a high-performance, low-cost, maintenance-free integrated digestion valve Component.
1.1 Characteristics Of 6X12-2 Series
 Orifice: 1.3mm diameter; small resistance along the way
 Flow rate: flow capacity Cv is about 0.03; flow rate is about 5mL/s (pressure difference 50Kpa, under 25ºC conditions, pure water)
Small dead volume: no dead volume inside the solenoid valve;
There are many selections of materials for parts in contact with liquid media
1. Valve body material: modified PTFE, PTFE (polytetrafluoroethylene)
2. Diaphragm material: FFKM (perfluoroether rubber), FKM (special fluorine rubber).
Long life, high performance, resistance to strong acid and alkali corrosion, high temperature and high pressure.
1.2 Words Definition    

1. Flow capacity CV

Also known as the flow coefficient, foreign general CV, domestic general KV, the two can be converted, are dimensionless parameters, on behalf of the liquid flow capacity of components, the actual design and use, according to the application conditions to convert into a dimensional flow reference.

--When measured, the flow rate of the medium, unit gal/min;
--Specifies the density of the water medium at 60°F,
--Pressure difference between front and rear of element under test.

--When measured, the density of the medium and the pressure difference before and after the front element..
Converted to the domestic general dimension, then:
Cv=0.03, which means that the flow rate of the element is 5.0mL/s under the condition of 25ºC and 50KPa.

1. Response Time T

From the inlet end, pass air or water with a medium of 0.25 MPa or the maximum working pressure difference, and pass a rated on-off signal to the solenoid valve under test to open and close the solenoid valve, and the pressure change on the outlet side of the solenoid valve is measured by a pressure sensor. At the same time, the test instrument with fast response time starts from the moment the voltage is turned on and off until the pressure rises to 90% of the maximum value (normally closed solenoid valve) or the pressure drops to 10% of the maximum value (normally open solenoid valve). Repeat Take the arithmetic average of the three tests as the turn-on response time or turn-off response time respectively.
According to engineering experience, the response time T exceeds 50ms, and the air gap of the valve is close to the design critical value, and there will be a phenomenon of instability of pull-in. Therefore, the response time is generally within the declared life and cannot exceed 50ms.
In addition, there is the use of the response time of the current method in the industry. According to the current change caused by the change of the coil magnetic field when the solenoid valve is switched, the action response time T1 is measured. T1 is generally less than the response time T of the air flow method.

1. Sealing ability

 External leakage
The solenoid valve is in the open state, the outlet end is closed, and the inlet end is supplied with water at a nominal pressure of 5ºC~40ºC, and the pressure is maintained for 1min. There should be no leakage at each connection of the solenoid valve, that is, external leakage.
 Internal leakage
From the two branches normally closed by the solenoid valve, apply pressure at one end and put the other in the water. Under the declared pressure, no air bubbles should leak out within 1 min..
 

6X12-2 Series Product Specification Sheet: 

Valve structure	Direct Acting Diaphragm Valve
Valve type	NC.2/2 way
Number of ports	X(X=1,2)
Orifice	1.3mm
Suitable tube diameter	Connect the hose connector (converted according to the outer diameter of the tube joint), or the rigid tube ferrule connector (with different ferrules according to the outer diameter of the tube)
Flow Cv	0.03
Medium	Strong acid, strong alkali, high temperature fluid, air, organic solvent, etc.
Ambient Temperature	5~40ºC
Operate Pressure (in-out)	0~0.3MPa	0~0.8MPa	0~1.5MPa
Leakage Rate	0
Response time	<30ms
Dead volume	0
Voltage fluctuation range	From -10% to +10%
Consumption Power	5.2W	5.2W	With energy-saving circuit: 15W (start),3W (hold)

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