LN83 Series Cage Guided Globe Control Valve

LN83 series cage guided globe control valve are single-seat LN8 series pressure balance control valves, one of the three largest base type products. Use separate sleeve, large guide structure, balance pressure sealing ring, high-performance nonmetal sealing ring, has a good dynamic stability, high control precision, allow the pressure difference is big, the operating force is small, large flow capacity, etc. Suitable working condition of normal temperature, differential pressure, under the action of alternating stress control.

Product Description

cage guided globe control valve advantages




Long life



1. Valve Trims


According to the needs of the working conditions, different materials and surface hardening treatment can easily be chosen to meet the requirements of each function module of trim to improve its performance of the corrosion, cavitation and erosion resistant, lengthen service life.


2. Valve body


The body of LN8 series control valves consists of two passages from upper and lower, forming a shape like letter "S". The design of an elliptical section reduces the flow resistance and turbulent flow to keep the flow fluent. The flap in the middle of upper passage can reduce the eddy flow and increase the flow capacity.

LN81 Series Single Seat Globe Control Valve



3. Actuator


The standard mate of LN8 series is AM8 Multi-spring pneumatic diaphragm actuator, which can be used in many conditions with the features of strong output force, high reliability, long lifespan and extensive application. The output force changes with the number of springs. The high stress resistant diaphragm, bearing maximum pressure of 0.5 MPa air supply, gives control valve a reliable shutoff. This type of actuator has a long life cycle with more than 1 million times.


Well Sealed



1. Structure


        A. New function modular design                                   B. Self-centring seat design


LN81 Series Single Seat Globe Control Valve


2. Packing system


The packing box assemblies are also optimized. Seal ring in the gland flange can prevent the dirt from entering and protect the packings. The V-ring is added with an U-groove and its angle is changed from conventional 90 to more efficient 85. The packing is a combination of alternating pure PTFE and PTFE with grafoil. When the temperature of fluid is above 200℃, the packing will be made by grafoil.

LN81 Series Single Seat Globe Control Valve


High Precision


LN8 series control valves are designed strictly on the basis of the IEC standard. They are the latest self-innovated modularized straight stroke control valve of SUPCON. We divide the trims into three modules, namely guide, control and seal module. We provide the best solution according to the function of each module and make action, control and seal more reliable.

Each index, linear, hysteresis, dead zone and leakage, for example, is full compliance with national standards.

Note: For below measured results, take LN8100 top guide single seat valve (PN110) as an example.

Test Items
National Standard
SUPCON Standard
Measured Results
Seat Leakage
0.06 L/min
0.064 L/min
0.01L/min
Rated Travel Error
+2.5%
+2%
1.32%
Start Error
±2.5%
±2%
0%
End Error
±2.5%
±2%
0.08%
BasicError
±1.5%
±1%
-0.52%
Hysteresis
1.5%
1%
0.16%
Dead Band
0.6%
0.4%
0.38%


Easy to maintain


The unique platform and modul design make it easy to remove and displace the parts without special tools, and moreover, easy to change the type of the valve only by changing few parts. A variety of material combinations is optional for the parts.



LN81 Series Single Seat Globe Control Valve

As a Professional Cage Guided Globe Control Valve supplier in China, Welcome new and old customers to consult us!


TECHNICAL PARAMETERS

Nominal SizeDN40 ~ DN400
Pressure RatingPN16/25/40/63/100;CL150(PN20)/300(PN50)/600(PN110)
Operateing Temperature-40℃~ 150℃
CharacteristicsEqual percentage, linear, quickly open
Rangeability50:1
Seat Leakage ClassANSI B16.104: IV、V、VI
Body MaterialWCB/WCC/LCB/LCC;WC6/WC9;CF8/CF8M;4A/5A etc.
Trim Material630/316/316+ST/316nitriding/316+Ni60/316+WC etc.
Seal MaterialPTFE+ graphite v-shaped packing, flexible graphite ring packing, graphite +PTFE braided packing etc.