ST75 series Floor Spring

Characteristics
ㆍ Floor spring with fix closing force for medium doors.
ㆍ Certified in compliance with EN 1154 /UL / ANSI 156.4 Grade 1
ㆍ Suitable for fire and smoke protection doors(No fire test conducted yet)
ㆍ For double and single action door up to 120kg
ㆍ Closing from 175˚ in both door swing directions with hydraulic control from 170˚
ㆍ Adjustable closing speed(175˚~15˚) and latching speed(15˚~0˚)
ㆍ Cast aluminum body.
ㆍ Universal cover plate in stainless steel.
ㆍ Mechanical Back Check function.
ㆍ Cement box in hot zinc plated.
ㆍ Extended spindle.
Technical attributes
Spring strenght(EN) 2 3
Standardard  and
external doors
≤ 850mm  
≤ 950mm  
Max.leaf weight(kg)   120
Non-Handed  
Closing speed
adjustable by valve
17.5˚ ~ 15˚
15˚ ~ 0˚
Backcheck(Mechanical)  
Hold-open Fix 90˚ ~ 105˚
Weight(kg)   5
Dimensions in mm Length 285
Width 82
Height 50
Floor spring tested to EN 1154  
ANSI 156.4 Grade 1  
Standard and Optional Function - ADJUST CLOSING SPEED
ㆍ VALVE"A" - controls closing speed from MAX. OPENING 175˚ ~ 15˚
ㆍ VALVE"B" - controls closing speed from approx. 15˚ ~ 0˚
ㆍ MECHANICAL VACKCHECK
ㆍ HOLD OPEN(Option possible)
     - Fixed 90˚
     - Fixed 105˚