Clip tType VII rail fasteninger system comprises of nut, flat washer, W4 clip, type T bolt T2, gauge board MG7, embedded iron TZ5, insulated gauge block G7, bottom plate P7,height adjustment plate TD7 under rail and height adjustment plate DTD7 under gauge board.
Clip type VII rail fasteninger system is widely used for 30 tons axle load railway with 60kg/m or 75kg/m ballast rail or elastic supporting non ballast track.
1）、Fasteninger force per seat ≥24 kN
2）、Longitudinal resistance per seat is no less than 11kN
3）、Fastener system should be in good condition after bearing 3 million times loading circulation, the gauge expansion should be less than 6mmRail fastening system shall be no damage after 300 million times of loading circulations, gauge enlarge shall be less than 6 mm
4）、Adjustment data for both sides of single strand of rail: －6～＋4 mm, adjustment data for gauge: －12～＋8mm
Adjustment data for rail high-low position.
5）、System elasticity: Plate static stiffness under rail is 140kN/mm
6）、Pulling resistance of embeddedpre-inset iron shoulder is no less than 70kN.