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Type S : Standard balls: P : Extended life balls R : Abrasive balls Specification T : Standard G : Polishing Y : Fully Coated Z : Ring Coated with Corundum X : Blended with Corundum Diameter From 16 to 42 mm Increment 1 mm Specific diameter available on request Hardness J : Soft N : Medium-Soft F : Medium-Hard H : Hard Temperature 1 : Standard balls up to 80°C 2 : Heat resistant balls up to 140°C BALL SIZE Balls must be slightly oversized (2 mm larger) to apply enough pressure inside the tube to ensure correct cleaning. This rule can be changed for specific reasons Larger diameter : used for a longer ball-life when the condenser pressure drop is higher than usual. This applies only when the type of fouling allows the use of soft or medium soft cleaning balls. In other cases, the use of extra oversized balls can lead to ball blockage inside condenser tubes, reducing the heat exchange surface and triggering tube corrosion. For the above reason, balls must not swell due to a chemical reaction with water. Smaller diameter : when using abrasive coated balls or when condensers are equipped with protective nozzles or when the CTCS design does not prevent the risk of the ball becoming wedged between the strainer bars. In this last case, the use of harder but smaller balls can be convenient BALL TYPE Standard (S) Used continuously in normal conditions for operation in freshwater or sea water. Soft for brass tubes, soft or hard for SS or titanium tubes. Extended life (P) Used when water fouling is not severe and can be wiped out easily. The spongy structure has a thin smooth layer which wears out slowly to extend lifetime. Heavy Duty Designed to solve the most difficult cases. The balls contain a mixture of polishing agent and rubber, ensuring a continuous and constant efficiency without causing damage to the tube structure Abrasive balls (R) Used in specific conditions for a short time period. The carborundum content in the balls abrades hard deposits. The use of these type of balls are recommended only when the CTCS does not run continuously and are manufactured only upon request. They are available in three different grades : - Fully coated (Y) - Ring coated with Corundum (Z) - Blended with Corundum (X) STARTWELL气动马达SDA077P 储能起动马达 厂家：STARTWELL 型号：SDC040-1 英国STARTWELL是柴油发动机机械起动器的领先企业，产品适配于2.5升-12升的发动机上，具有隔爆，防水及完全无电等性能，作为主要或紧急起动装置，适用于煤矿及石油钻塔等恶劣环境下。其产品有迷你型，中型，大型，超大型及重载型。 MetPak RG便携式气象站 英国Gill公司 MetPak II便携式气象站 英国Gill公司 MetPakPro 便携式气象站 英国Gill公司 GMX500 MaxiMet微型气象站 GMX600 MaxiMet微型气象站 GMX200 MaxiMet超声波风力计 GMX700 MaxiMet微型气象站 WindMaster HS三维风速仪 WindMaster三维风速风向仪 WindMaster Pro三维风速风向传感器