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Home > Builders' Hardware > Products > Door Closers > GEOPRO > CONCEALED TYPE GC-4V Application/Feature
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Door Closers

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GEOPRO CONCEALED TYPE
CONCEALED, THE ULTIMATE IN DESIGN

GC-4V

APPLICATION

Model No. Applicable door size Thickness of applicable door (mm)
Without hold-open With hold-open Steel door Wooden door
Right hand Left hand Right hand Left hand Width
(mm)
Weight
(kg)
Standard
installation
Top jamb
installation
Standard
installation
Top jamb
installation
GC-4V-R GC-4V-L GCS-4V-R GCS-4V-L 800 to 1050 15 to 100 40 or more 40 or more 45 or more 40 or more
GCA-4V-R GCA-4V-L GCAS-4V-R GCAS-4V-L

FUNCTION

Specification Installation Standard Top jamb
Handing Select handing, Right hand or Left hand
Material Aluminum Alloy
Adjustable range of
Max. opening angle
Offset hung case: 18 to 25mm offset 75° - 105° 68° - 105°
Center hung 73° - 109° 73° - 109°
Offset hung (180° opening) 98° - 180° 92° - 180°
Performance Durability 500,000 cycles
Standard function 1st speed Adjustment
2nd speed Adjustment
Latching Action
Delayed action *GCA-4V GCAS-4V
Closing Force Adjustment


1ST AND 2ND SPEED CONTROL VALVES

These independent valves enable you to adjust the closing speed according to the usage circumstances.


LATCHING ACTION

This ensure to close the door firmly by increasing the closing speed at 2 degree before closed position.


DELAYED ACTION

An optional delayed action feature adjusted by means of an independent valve. Once set, the door when opened beyond to degrees enters into a delayed mode allowing additional time before the closing.



TORQUE ADJUSTMENT FUNCTION

Spring power adjustable according to door weight and size.


ADJUSTING CLOSING POWER ACCORDING TO TABLE

Max. door width (mm) Max. door weight (kg) Turns of closing power adjustment nut
from Preset from Min.
800 30 -6 0
900 45 -4 +2
950 65 0 +6
1050 100 +6 +12


HOLD-OPEN DEVICE (ES STOPPER)

More strength and more hold-open power is realized with newly developed ES stopper.