1.Products

   The new AT rack& pinion pneumatic actuator, combined with the latest national and international technology, with the innovative and optimized CAD three-dimensional model design, beautiful and compact appearance as well as modern shape, is manufactured by Yongjia Kaixite Valve Co., Ltd. It adopts new materials and processes, to enable more reliable quality and performance of products; it’s more economical, with various specifications and models; since the product is in complete consistence with international standard technical specifications, it can meet current and future requirements.

a.The actuator, with symmetrical double-piston rack and pinion structure design, quick and stable action, high precision and high output power, is capable of reverse rotation through simple change in the installation position of the piston. 
b. It has long service life and small friction coefficient, with the excellent extruded aluminum alloy cylinder, high-precision processed inner bore and hard anodized (in special situation, anodizing + Teflon coating) outer surface.
c.The integrated design and same cylinders and end caps of different models of single-acting and double-acting actuators enable changing the acting mode simply by assembling springs or disassembling springs. 
d. The combined pre-loading safe spring assembly enables convenient and safe installation or reduction of springs in the process of assembly or application. 
e. The two individual regulating screws fixed on the outer side of the actuator enable more precise and convenient adjustment of the opening or closing position of the valve; if it requires full-stroke adjustment, you need to fix two extra longer regulating screws on its two end caps. 
f. The multi-function position indicator, with on-site visual instruction, in line with VID/VIE3845 and NAMUR standards, is capable of installing and outputting all accessories, such the limit switch box, electric positioner and position sensor (Pepperl+Fuchs and Turck sensor).
g.The gas source interface, which is in compliance with the NRMAR standard, can be directly fixed on the NUMAR standard solenoid valve.

h. The composite bushing, piston guiding ring and the bearing of output shaft on the back of the rack can be used for preventing metal-to-metal friction, enhancing lubrication and enabling low friction and long service life. 
i.All fastening pieces are made of stainless steel, and thus are corrosion-resistant for a long time. 
j The connection part is consistent with the latest international standard ISO5211and DIN3337 (F03-F25) specifications, and thus enable interchanging and general installation. 
 

2.part and materials

3.Working principle

1)working principle of the double-acting actuator

  When the air supply pressure enters the middle chamber between two cylinder pistons from the air port (2), it will separate the two pistons and make them move toward both ends of the cylinder, air in the air chamber be discharged from the air port (4) and the rack of two pistons simultaneously drive (gears of )the output shaft in counterclockwise rotation. On the contrary, when the air supply enters the air chambers on both ends, it will make two pistons move toward the middle of the cylinder, where the air is discharged from the air port (2) and make the rack of two pistons simultaneously drive (gears of )the output shaft in clockwise rotation. (If the piston is fixed in the opposite direction, the output shaft will be in opposite rotation.)

2)working principle of the single-acting actuators 

When the air supply pressure enters the middle chamber between two cylinder pistons from the air port (2), it will separate the two pistons and make them move toward both ends of the cylinder, air in the air chamber be discharged from the air port (4) and the rack of two pistons simultaneously drive (gears )the output shaft in counterclockwise rotation. On the contrary, when the air supply enters the air chambers on both ends, it will make two pistons move toward the middle of the cylinder, where the air is discharged from the air port (2) and make the rack of two pistons simultaneously drive (gears of )the output shaft in clockwise rotation. (If the piston is fixed in the opposite direction, the output shaft will be in opposite rotation.)

 

 4.Appearance & connection dimension

 

Type	AT52	AT63	AT75	AT88	AT100	AT115	AT125	AT145	AT160	AT180	AT200	AT240	AT265
ISOflange	F04	F05	F05-07	F05-07	F07-10	F07-10	F07-10	F10-12	F10-12	F12	F14	F16	F16
L	140.5	158.5	210.5	247.5	268.5	315	345	408.5	437.5	487	543	633	728
B	26.5	30	30.5	32.5	38.5	42.5	45	47.5	52	58.5	62.5	78.5	165
C	20	20	20	20	20	30	30	30	30	50	50	50	50
φD	40	40	40	40	40	56	56	65	65	80	80	115	115
E	59	72	84.5	97.5	111	127	136	156.5	169	190.5	213	251	298.5
F	69	85	102	115	127	145	157	177	196	220.5	245	298.5	330
G	29	36	42.5	49.5	56	64	69.5	80	88	99	110	131	163.5
H	41.5	47	52	56.8	67	77	82	91.5	99	105	112	131	166
Jmin	12	16	16	19	19	24	24	29	29	29	38	38	48
A	80	80	80	80	80	80	80	80	80	130	130	130	130
M	30	30	30	30	30	30	30	30	30	30	30	30	30
ΦO1	42	50	50	50	70	70	70	102	102	125	140	165	165
ΦO			70	70	102	102	102	125	125
P1	4-M6	4-M6	4-M6	4-M6	4-M8	4-M8	4-M8	4-M10	4-M10	4-M12	4-M16	4-M20	4-M20
P			4-M8	4-M8	4-M10	4-M10	4-M10	4-M12	4-M12
Q	11	14	14	17	17	22	22	27	27	27	36	36	46
V	24	24	24	24	24	24	24	24	24	24	24	40	40
W	32	32	32	32	32	32	32	32	32	32	32	45	45
Y	M5×8	M5×8	M5×8	M5×8	M5×8	M5×8	M5×8	M5×8	M5×8	M5×8	M5×8	M6×10	M6×10
Z	1/8"	1/8"	1/8"	1/8"	1/4"	1/4"	1/4"	1/4"	1/4"	1/4"	1/4