ZN-B Series

 

Products Features


1.National invention patent products,build network with fire control system ,apply to normally opened fire door.

2.On fire or accident, fire door can close in time with help of linkage door closer, and send alarm signal to fire control system.

3.Function of five different closing methods , suit for different conditions.

4.Adjustable closing and latching speed, two independent valves.

5.Fixing function of adjusting optionally stop position at 20°-150°,or no fixing.

6.Different closing power of 1# 2# 3# 4# to choose and apply.

7. Fill high-quality fireproof oil ,anti-wear and low-freezing, flexibly apply in extreme conditions (-40℃-60℃).

8. Unique structure design,apply left hand or right hand, no adjustment,easy installment.
 

Quality Guarantee

Product Models
 

Special Function

Instant Inspect , Intelligent Connect:you can know door’s condition because it can output signal of opening and closing , and connect fire-controlling system.




five different closing methods, sastify different conditions.



1、manual closing



 

2、Temperature control closing: door closer will close automatically , if it goes up to 68℃ , whenever it is.


3、Smoke control closing: it will close by itself ,if it senses smoke in 3seconds.



4、Electric control closing: it will close if electricity turns off .
 

5、remote control closing: it will receive signal and close door ,when fire engine sends signal to door closer after fire occurs. 


quality guarantee.

 

products description
 

body possessment. ● High strength casting aluminum shell ●Processing using disposable fixture procedures in order to complete the processing method. In terms of hole smoothness, distance cylindricity and piston hole and gear shaft hole center, verticality etc. have been effectively controlled, to ensure the excellent performance of the product. ● Compared with the traditional machining methods, it has the advantages of high efficiency, high accuracy and dimensional stability.
	Two stage speed regulation ● Clockwise to tighten control valve can reduce the speed of closing. ● Counterclockwise loosening control valve can accelerate the speed of closing. Note: when adjusting the speed valve, do not speed the valve out of the speed adjustment hole, resulting in the loss of hydraulic oil leakage function
adjustment lever ● The adjusting rod to rotate smoothly to ensure compliance, the door can be turned off. ● The connecting rod bearing with precision bearing powder, service life of more than 5 million times.
	The gear shaft and the rocker arm is connected with square hole ● The four hole of the rocker arm is made of fine punching and fine blanking, and the clearance between the shaft and the gear shaft is controlled within 0.1mm ● The locking screws shall be of grade 10.9 strength and combined screws to avoid loosening of the screws and cause damage to the product
High quality spring The spring is made of high quality 60Si2Mn 60Si2Mn manufacturing is often used in automobile manufacturing transmission gear, good toughness, high strength, low temperature resistance, high fatigue resistance, prevent other spring fracture phenomenon
	High quality gear shaft ● The gear shaft made of 20Cr steel manufacturing, good toughness ● Shaft heat treatment HRC 50 degrees -55 degrees hardness, low temperature resistance, high fatigue resistance ● After rough grinding, fine grinding, two surface treatment, surface roughness Ra of 0.2 mu m, excellent mechanical properties.
Premium piston ● The piston is made of 45# round steel ● The tooth surface is treated by high frequency quenching, and the HRC is 45 degrees -50 degrees to increase the wear resistance of the tooth surface ● After rough grinding, fine grinding, two surface treatment, surface roughness of Ra 0.2 m, cylindricity of 0.005mm, excellent mechanical properties
	Piston filter screen ● The filter is 240 mesh stainless steel screen. ● The impurity produced filter can effectively filter the piston and the piston cavity by the movement of the door closer work more smoothly, stability, prolong the service life.
O-ring ● Type O sealing ring for imported material ●5 million wear test, at low temperature -40 degrees Celsius, high temperature 60 degrees Celsius can run as usual, the sealing is strong, put an end to the oil leakage phenomenon
	Gear gasket ●The material of gear gasket is 65Mn spring steel ● To improve the abrasion of gear shaft and side cover, reducing the lateral movement of small gear shafts dynamic clearance.