
FEATURES
A. Suitable for double-action doors, or left and right single-action doors.
B.Elegant, multi-functional, practical, with quality assurance.
C.HD-850 provides a mounting solution for door control that must be provided without affecting the aesthetics of the door.
D.Load arm and floor/threshold pivot are included in the box.
E.EN2/EN3/EN4 for 900-1200mm wide doors.
SPECIFICATIONS
ITEM CODE | ●HD-850 |
ITEM NAME | ●Transom Overhead Concealed Door Closer |
MAX DOOR WEIGHT | ●100-150KG |
MAX DOOR WIDTH | ●900-1200MM |
HOLD OPEN | ●90° |
MAX OPEN-ANGLE | ●105° |
MATERIAL | ●Cast iron body |
| ENGINE CYLINDER | ●Double |
| DIMENSIONS | ●271*87*40mm |
CLOSING SPEED ADJUSTMENT | ●Valve 1: 90°-20°, Valve 2: 20°-0° |
APPLICABLE TEMPERATURE | ●-40°C ~ 60°C |
USAGE | ●Wooden, aluminum, iron doors |
DURABILITY TEST | ●500,000 cycles |
OEM | ●Available |







WHY CHOOSE US
GEKRONE floor springs are certified by the world's most difficult American Standard ANSI Grade1 2 million times test.
GEKRONE is the main drafting unit of the standard "Hydraulic Floor Spring".
GEKRONE has 4 national invention patents and dozens of utility model patents related to floor springs. The technical strength is strong.
Our Service
OEM/ODM service:We have a strong R&D team and can provide various designs to meet your needs.Also we can produce the products according to customers' requirements Such as Customized packaging, customized labels.
Delivery service:Fast delivery, if it is an order we have stock, it will take 7 days, if it is an order we don't have stock, it will take 30-45 days.
Quality control and after-sales service:There will be strict product inspection before shipment.If there is a problem, We will provide you with solutions.
FQA
Q: Are you a trading company or a manufacturer?
A: We are a professional manufacturer of door control hardware for many years.
Q: Can you provide samples for quality inspection?
A: Yes, we are willing to provide samples, but the courier cost will be borne by you.
Q: What is the payment method of your factory?
A: T/T is the best.
Q: Where is your factory?
A: Our factory is located in Jiangsu Province, and we also have factories in Zhejiang and Anhui, which are very close to Shanghai. You are warmly welcome to visit our factory at your convenience.