ブックタイトルHYDRAULIC SNUBBERS

概要

HYDRAULIC SNUBBERS

2.6 Size Selection GuidelineSelection of the proper snubber assembly shall be made based on the following design elements:① Design dynamic load.② Amount of Piston Displacement (calculated from pipe thermal travel) and its direction.③ Overall installation length allotted for the snubber assembly.④ Details of end conditions (Bracket or Pipe clamp).⑤ Pipe size, material, and operating temparature, insulation thickness, if any.(1) Rated LoadSelect Snubber unit having a rated load nearest to but greater than the design load (calculated dynamicload).For example, when the calculated design load is 45kN( ≒ 4,500kgf), size SN 6 (rated load = 60kN( ≒6,000kgf) ) is the proper size to be selected.Min. Snubber size is recommended depending on applicable pipe size as per below table.(2) StrokeThe total stroke of the snubber unit selected must be sufficiently greater than the calculated pistondisplacement so as to provide a safety margin for the extra movement not counted in at thedesigning stage of the piping system. STC recommends to consider Min. 25mm margin at both side.[25mm margin + design piston displacement + 25mm margin ?? Total Stroke]Each snubber unit is factory pre-set at designated Cold Position (C.P.) to provide the ready-to-installlength of the assembly based on the design amount and direction of the piston displacement.Customer does not need to adjust piston position at site during installation works.(3) Assembly TypeType EA/EB : With extension attachments, for a longer installation length between the rangeL1(Max) and L1(Min) as given in the table of Page 12 & 14.Type FA/FB : With the shortest attachments, for a limited installation length. The overall dimensionsare as given by L2 in the table of Page 12 & 14.2. HYDRAULIC SNUBBERSize No. Rated Load(N) Rated Load(kgf)SN 03 3,000 305SN 06 6,000 611SN 1 10,000 1,019SN 3 30,000 3,059SN 6 60,000 6,118SN 10 100,000 10,197Size No. Rated Load(N) Rated Load(kgf)SN 16 160,000 16,315SN 25 250,000 25,492SN 40 400,000 40,788SN 60 600,000 61,182SN 100 1,000,000 101,971Pipe Size Min.Snubber Size～ 5" 036" ～ 10" 0612" ～ 16" 118" ～ 24" 325" ～ 6Type FATotal Stroke 100 160 250 310 400 460 550 630 * 710 *Recm. Design PistonDisplacement 0 ～ 50 51 ～ 110 111 ～ 200 201 ～ 260 261 ～ 350 351 ～ 410 411 ～ 500 501 ～ 580 581 ～ 660Total Stroke and Design Displacement （mm）* For special stroke 630, 710 is available upon request.Type EA9