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Where to Find A Reliable Spool Rubber Expansion Joint Supplier?

July 4, 2018 by lanphan  

Spool type rubber expansion joint is designed for the non-standard products, it has the same function with molded type rubber expansion joint. Do you know where to find a reliable spool rubber expansion joint supplier?


rubber expansion joint

What are the components of the fabric expansion joint?

July 4, 2018 by lanphan  

Fabric Expansion Joint is an assembly that utilizes a fabric belt element to allow for the  movement of ductwork, as opposed to a metal expansion joint which allows for the movement by means of convoluted metal bellows. In this paper the author would like to describe the main components of fabric expansion joint.

fabric expansion joint

Single Sphere Flexible Rubber Expansion Joint

June 25, 2018 by lanphan  

GJQ(X)-DF-I Single Sphere Flexible Rubber Expansion Joint is made up of flexible rubber joint sphere and flange or flat union. And the rubber joint sphere is a recombination of inner & outer glue line and enhancement layer.rubber expansion joint

Features About EPDM Rubber Expansion Joint

June 23, 2018 by lanphan  

EPDM rubber is the terpolymer of ethylene, propylene and conjugated diene. EPDM rubber expansion joint has superior performance on oxidation resistance, ozone resistance and corrosion resistance. To be specific, EPDM rubber expansion joint has following features:

What is A Flexible Exhaust Bellows?

June 4, 2018 by lanphan  


The addition of braid to our standard bellows provides all the features of standard bellows plus enhanced external protection, prevents hose elongation under pressure, and damps vibration. wire braid is manufactured from bright, high-quality annealed wire in a wide range of alloys and designs. Wire braid offers excellent coverage and minimizes spring-back during bellows fabrication.

flexible exhaust bellows

flexible exhaust bellows

Lanphan stainless steel exhaust bellows often be used for the exhaust systems of trucks, forestry, marine, power generation, buses, tractors, construction and military. The stainless steel exhaust bellows is an vital connecting piece in exhaust piping system, it uses hydraulic pressure forming technology to maintain a good gas tightness. The flexible exhaust bellows is applicable for the discharge of all kinds of gases, reduce the engine pollution to the lowest point.


The flexible exhaust bellows is always made from stainless steel, which is a high temperature and corrosion resistant metal material welcomed by most pipe expansion joints. Our stainless steel exhaust bellows could be braided with steel wire outside the bellows to prompt strength and pressure.

Lanphan flexible exhaust bellows are various in types and dimension, we can produce the bellows from DN25mm to DN200mm, flange and braiding could be custom-made according to customer requirements. Lanphan flexible exhaust bellows are in good flexibility and gas tightness, product length is unconstrained. It is mainly used for the piping exhaust system to absorb vibration and reduce noise, also convenient for installation and lengthen piping service life.

How to Select Vacuum Pump for Laboratory?

May 21, 2018 by lanphan  

  As we known, laboratory vacuum pump is used for gas pumping, by reducing the pressure in vacuum chamber to obtain required vacuum degree. In order to reach different technical index, working efficiency, service period and different vacuum zone needs to select different laboratory vacuum pump . To get optimum allocation for lab, Lanphan would like to offer six steps on how to select vacuum pump for laboratory.

laboratory vacuum pump use with rotovap and chiller

  1.Confirm gas type and sucking rate: if pumped gas type react with pumping liquid, the laboratory vacuum pump system is going to be polluted. Meanwhile, exhausting time and gas flow during pumping process should also be considered.

  2.Confirm vacuum degree: vacuum degree decides the structure of vacuum pump for laboratory. If required absolute pressure(ultimate vacuum) is close to “0”, only laboratory vacuum pump could meet the requirement; but if require to close to 1bar(atmospheric pressure), you can choose roots blower or centrifugal blower.

  3.Confirm working vacuum range: every technology has its own vacuum range. You need to check the vacuum degree requirements for each technology.

  4.Confirm vacuum volume: one needs to check the needed time for required vacuum degree, vacuum piping flow resistance and leakage, also the pumping rate to maintain vacuum.

  5.Confirm ultimate vacuum: system ultimate vacuum decides the optimum working vacuum degree. Generally speaking, system ultimate vacuum degree us 20% lower than working vacuum degree, and 50% lower than backing pump’s ultimate vacuum degree.

  6.Design formulas: S=2.303V/tLog(P1/P2), S=vacuum pumping rate(L/s), V=vacuum chamber volume(L), t=require time to reach desired vacuum degree, P1=initial vacuum degree(Torr), P2=require vacuum degree(Torr). Please note above formula is theoretical calculation, other variable factors haven’t taken into account, such as piping flow resistance, leakage, filter flow resistance, pumping gas temperature, safety absorption, etc..


  Above is the six steps on how to select vacuum pump for laboratory. Should you have any other questions about laboratory vacuum pump, please contact Lanphan at any time.

How to Make an Enquiry on Flanged Expansion Rubber Joint?

May 21, 2018 by lanphan  

  The flanged expansion rubber joint is the ideal plumbing setting and pipeline laying out equipment, it becomes the essential pipe connection element in piping system. The flanged expansion rubber joint consists of internal layer, fabric reinforced casing ply and external rubber layer, connect with clamp or flange to compensate movements in pipelines.

rubber pipe expansion joint

  Rubber materials of NR, NBR, FKM, EPDM, IIR, CR, EPDM could be used separately or combined to suit for different medium and environment. The rubber pipe expansion joint installed in pipeline to bear pressure, absorb shock, reduce noise and compensate movement.

  Knowing the basic facts of a rubber pipe expansion joint, we’d like to offer you the matters should pay attention when making an enquiry on flanged expansion rubber joint. Following are the notices for your information.

  Firstly make sure to give detailed technical parameter such as diameter, length, pressure and flowing medium in pipeline to rubber pipe expansion joint suppliers.

  Then it comes to rubber material selection. EPDM rubber is applicable for high temperature below 150℃, it is acid and alkali resistance, corrosion resistance, power plant desulfurization, lime slurry, gas, etc; NBR is best for oil medium, including hydraulic oil, aviation oil and other aviation oil, the temperature below 80 degrees; NR is best suited for water, air, compressed air and temperature below 80℃; IIR is wear-resistant, usually used in mining occupations, particulate media delivery pipeline; FKM suitable for high temperature pipeline, it has good resistance to weak acid, strong acid; some applications require Teflon lining inside the rubber pipe expansion joint to resist acid, alkali, emulsion, dilute sulfuric acid, it better to use with temperature range of -40℃ to 150℃, and other special mining environment.

  Other notices that need to know: flanged expansion rubber joint should be far away from heat. Bolts should be tightened by symmetry gradually to avoid partial leakage. Fixed support or fixed bracket is necessary when actual axial pressure on rubber pipe expansion joint is bigger than support of pipeline. Actual axial pressure on flanged expansion rubber joint should be less than the support of pipeline to avoid possible pulling off.


  The Chinese Spring Festival holiday begin from 10th, Feb. to 22th, Feb., if you have new enquiry awaiting for quotation, please send to us as soon as possible.

Multiple Uses of Rotovap Extraction

May 21, 2018 by lanphan  

  We are very familiar with rotary evaporator or rotovap, but do you know the multiple uses of rotovap extraction ? In traditional ideas, we treat rotary evaporator as a rotovap extraction equipment that used in chemical laboratories. In fact, rotary evaporator uses in multiple industries that you can’t even imagine.

rotovap extraction

  Rotary evaporator uses: kitchens in luxury hotels

  The rotovap extraction is used to evaporate water and extract solvents, what’s the purpose of rotovap extraction in a kitchen? Nowadays, more and more chefs are using rotovap extraction to get high purity foods, for example, using a rotovap extraction method to evaporate the water in fruit juice and get a glass of rich fruit juice, which is more healthier than additive juice. More than a glass of fruit juice, rotary evaporator uses even spread to cake making when getting thick vegetable juice.

  Rotary evaporator uses: R&D in cosmetics company

  Cosmeceuticals is a popular cosmetics that produced and designed in medical view. In general, our skin can only absorb 7% from common biochemistry skin care products, but the data reaches up to 13% for traditional Chinese medicine skin care products. When making the cosmeceuticals, rotovap extraction is a necessary procedure, it needs to dissolve the medicine, and make cosmetics and medicine has the same viscosity.

  Rotary evaporator uses: R&D in medicine

  Every medicine laboratory has a set of rotary evaporator, sometimes it is more frequently used in a medicine lab than in a chemical lab. The rotovap extraction and distillation are necessary steps to develop a kind of medicament.

  Rotary evaporator uses: water quality monitoring

  Water quality testing means testing the total dissolved solids(TDS) in water, if we want to analysis 1 liter water that contains impurity, now a rotary evaporator is used to evaporator most clean water, so that we can accurate calculate the impurity.


  Interested in our products? Please contact rotovap@lanphan.com

What Does a Rotary Evaporator Do?

May 14, 2018 by lanphan  

What does a rotary evaporator do? The function of rotary evaporator can be concluded to the following aspects. Solvent recycling, power drying, chemical synthesis, research, solvent distillation, extraction, active agent concentration, liquid mixture separation, vacuum distillation of sensitive substances.

The rotary evaporatorneeds to be operated with gentle, users must follow instruction carefully when operating the rotary evaporator. And function of rotary evaporator can be fully come into play only if by following the instruction. Many people ask us about “what does a rotary evaporator do?”, by using a laboratory rotary evaporator, you can find the most efficient way of removing a volatile solvent form a non-volatile sample. We can say rotary evaporator is the standard instrument in modern chemical and biology laboratory.

function of rotary evaporator

  Evaporation rate increasing is the key of how rotary evaporator works. The function of rotary evaporator works by rotating the sample to increase effective surface area and heating the solution, as well as by reducing the pressure to lower boiling point of solvent. When you are going to operate a rotary evaporator, make sure to power on the machine at first, then adjust the glass components by using manual lift to give it sufficient space above water bath . Don’t forget to see whether the temperature and water level of water bath is qualified, adjust it accordingly by adding or cooling the distilled water.

  There are so many function of rotary evaporator, but users should be aware of that hazards solvents and explosions may threat the danger of operator. The explosions may be caused by concentrating unstable impurities or taking certain unstable compounds. So safety precaution measures is a must to avoid contact with cloth, hair or necklaces, safety must comes the first.


  Preceding text is the function of rotary evaporator, rotovap is a good lab companion for chemists. Lanphan rotovap has so many advantages, we are waiting for your enquiry at sale@lanphan.com.

Frequently Used Additive for Rubber Flanged Expansion Bellows

May 14, 2018 by lanphan  

Rubber is the main material of rubber bellows expansion joint, when we prepare rubber material, additive is used to strength the performance of rubber flanged expansion bellows. What are the commonly used additive for rubber flanged expansion bellows? Today we tell you the eight major additive for rubber expansion bellows.

rubber joint

Rubber vulcanizing agent: in the production process of rubber expansion bellows, add with sulfur to prevent vulcanization revert, and improve heat resistance, enhance the adhesive force of rubber and cord fabric.

Rubber accelerators: rubber accelerators is used to promote vulcanization function, it can shorten vulcanizing time of rubber flanged expansion bellows or lower vulcanizing temperature, also enhance the physical and mechanical property of rubber flanged expansion bellows.

Rubber antioxidant: there are many types of antioxidant for the rubber expansion bellows. It includes heat oxygen aging resist antioxidant, ozone aging resistant antioxidant, fatigue resistant antioxidant, etc.

Rubber filler: no matter natural rubber or synthetic rubber, most rubber flange expansion bellows contains 10-50% filler of total weight. According to different elongation, hardness tensile strength, permanent deformation, tear strength, add different addition quantity to improve the performance of rubber flanged expansion bellows.

Rubber paste agent: excellent elasticity, convenient to use, strong viscous force at first time.

Rubber softener: it is used to improve the processing and using property of rubber expansion bellows, it can promote the plasticity of rubber material and reduce rubber viscosity and mixing temperature.

Rubber colorant: the purpose is help rubber flanged expansion bellows obtain required color and lustre, and carbon black often be added into the rubber material to get mechanical property.


Rubber active agent: active vulcanization system, promote vulcanized rubber’s cross linking density, improve aging resistant performance.