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China TBNS Series Stainless Steel Pneumatic Actuator Suppliers - Factory Direct with ATEX Certification

Introducing the TBNS Series Stainless Steel Pneumatic Actuator, a premier choice for industrial automation control in China. With 16 models available, constructed from high-quality 304 stainless steel or 316 stainless steel, our actuators deliver exceptional performance, offering an output torque ranging from 20N.m to 8120N.m with a 5 bar air supply. The actuators are designed to meet ISO5211/DIN3337 standards for seamless valve connection and feature a Namur interface for easy accessory attachment. With precise ±5° adjustment capability and ATEX certification, they ensure safety and reliability in hazardous environments, As a leading factory and supplier in the pneumatic actuator market, we provide both double-acting and single-acting types suitable for various applications, including ball valves, butterfly valves, and plug valves. The TBNS Series is engineered for linear motion via a piston rack that drives the gear output shaft, making it the ideal solution for achieving efficient pipeline automation control in various rotary applications. Choose our TBNS Series actuators to enhance your industrial processes with confidence and efficiency

Product Detail

Features of the TBNS Series stainless steel pneumatic actuator

ASTM316L, 316, 304 stainless steel pneumatic actuator with electro-polish finish offer excellent resistance to most corrosive chemicals as well as industrial atmospheres.
Dual piston rack and pinion design for compact construction, symmetric mounting position, high-cycle life and fast operation, reverse rotation can be accomplished in the field by simply inverting the pistons.
Multiple bearings and guides on racks and pistons, low friction, high cycle life and prevent shaft blowout.
Modular preloaded spring cartridge design, with coated spring for simple versatile range, greater safety and corrosion resistance, longer cycle life.
Fully machined teeth on piston and pinion for accurate low backlash rack and pinion engagement, maximum efficiency.
The two independent external travel stop adjustment bolts can adjust ±5° at both open and close directions easily and precisely.
Stainless steel fasteners for long term corrosion resistance.
Full conformance to the latest specifications: ISO5211, DIN3337 and Namur for product interchangeability and easy mounting of solenoids, limit switches and other accessories.

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Parts and Materials

NO	Description	Qty	Standards Material
1	Indicator Screw	1	Plastic
2	Indicator	1	Plastic
3	Snap Ring	1	Stainless steel
4	Washer	1	Stainless steel
5	Outside Washer	1	Engineering Plastics
6	Body	1	Stainless steel
7	Piston	2	Stainless steel
8	Piston O-ring	2	Viton/NBR
9	Piston Bearing	2	Engineering Plastics
10	Spring / Spring Retainer(L,R) / Retainer Connector	0-12	Spring Steel 66 Nylon 66 / Brass
11	End-Cap O-ring	2	Viton/NBR
12	End-Cap	2	Stainless steel
13	Stop screw	2	Stainless steel
14	End-Cap Stop Screw	8	Stainless steel
15	Guide Piston	2	Nylon 66
16	O-ring(Adjust screw)	2	NBR
17	Nut(Adjust screw)	2	Stainless steel
18	Adjust screw	2	Stainless steel
19	Plug	2	NBR
20	Inside Washer	1	Engineering Plastics
21	Cam	1	Stainless steel
22	Bearing Top	1	Engineering Plastics
23	O-ring(Top)	1	Viton/NBR
24	Pinion	1	Stainless steel
25	Bearing Bottom	1	Engineering Plastics
26	O-ring Bottom	1	Viton/NBR

Operating Principle and Out Torque

Double Action

CCW

Air to Port A forces the pistons outwards, causing the pinion to turn counter clockwise while the air is being exhausted from Port B.

Air to Port B forces the pistons inwards, causing the pinion to turn clock wise while the air is being exhausted from Port A.

Single Action

CCW

Air to Port A forces the pistons outwards, causing the springs to compress. The pinion turns counter-clockwise while air is being exhausted from Port B.

Loss of air pressure, the stored energy in the springs forces the pistons inwards, the pinion turns clock wise while air is being exhausted from Port A.

Output Torque With Double Acting

Output Torque Table of SK Series Pneumatic Actuators with Double Acting

Model	Air Pressure
Model	3bar	4bar	5bar	6 bar	7bar	8bar
TBNS-052DA	11.6	15.4	19.2	23	26.8	30.6
TBNS-063DA	20.9	28.1	35.3	42.4	49.6	56.8
TBNS-075DA	28.8	38.8	49	58.8	68.6	78.4
TBNS-083DA	44	58.7	73.5	88.2	102.9	117.6
TBNS-092DA	66.2	88.3	110.3	132.5	154.5	176.6
TBNS-105DA	95.6	127.2	158.8	190.4	222	253.6
TBNS-125DA	145.3	193.9	242.5	291.1	339.6	388.2
TBNS-140DA	250	337	425	511	596	681
TBNS-160DA	381	514	649	779	908	1038
TBNS-190DA	615	828	1046	1255	1464	1673
TBNS-210DA	782	1043	1303	1564	1825	2085
TBNS-240DA	1131	1508	1885	2262	2639	3016
TBNS-270DA	1720	2293	2866	3440	4013	4586
TBNS-300DA	2291.4	3055.2	3819.0	4582.8	5346.6	6110.4
TBNS-350DA	3426.0	4568.0	5710.0	6852.0	7994.0	9136.0
TBNS-400DA	4872.0	6496.0	8120.0	9744.0	11368.0	12992.0

Sizing: Double Acting Actuators

The suggested safety factor for double acting actuators under normal working conditions is 20%-30%.
Example: The torque needed by valve = 100N.m. The torque considered safety factor (1+30%) = 130N.m. Air Supply = 5Bar. According to the above table, we can choose the minimum model: TBNS-105DA.

Output Torque with Spring Return

Model	Spring Qty.	Output Torque of Spring		Output Torque of Air Supply
		Output Torque of Spring		3bar		4bar		5bar		6 bar		7bar
		0°	90°	0°	90°	0°	90°	0°	90°	0°	90°	0°	90°
TBNS-052SK	5	3.6	5.4	6.5	4.6	10.8	8.6	-	-	-	-	-	-
	6	4.3	6.7	6	3.3	10.2	7.3	-	-	-	-	-	-
	7	5.1	7.9	-	-	9.6	6.1	13.7	10.1	-	-	-	-
	8	5.8	9.2	-	-	9	4.8	13	8.8	-	-	-	-
	9	6.6	10.4	-	-	8.4	3.6	12.4	7.6	16.4	11.6	-	-
	10	7.3	11.7	-	-	7.8	2.3	11.8	6.3	15.7	10.3	19.6	14.3
	11	8.1	12.9	-	-	-	-	11.1	5.1	15	9.1	18.8	13.1
	12	8.8	14.2	-	-	-	-	10.5	3.8	14.3	7.8	18	11.8

Sizing: Spring Return Actuators

The suggested safety factor for spring return actuator under normal working conditions is 30-50%
Example: The torque needed by valve = 80N.m. The torque consider safety factor (1+30%) = 104 N.m. Air Supply = 5Bar.
According to the table of spring return actuators' output, we find output torque of TBNS140 K7 is:
Air stroke 0° = 308N.m | Air stroke 90° = 247N.m | Spring stroke 90° = 181N.m | Spring stroke 0° = 120N.m.
All the output torque is larger than we needed.
Attention: During the restoration, the spring return actuators' output torque will not be affected by the inputting air from port B. On the contrary, it will help the restoration of springs.

Operating Conditions

1. Operating Media

Dry or lubricated air, non-corrosive gases, or oil.

2. Air Supply Pressure

Double acting: 2~8 Bar; Spring return: 2~8 Bar

3. Operating Temperature

Standard: -20℃~+80℃
Low temp: -40℃~+80℃
High temp: -20℃~+150℃

4. Travel Adjustment

Adjustment range of ±4° for the rotation at 90°

5. Lubrication

Under normal operating conditions, no additional lubricant is required.

6. Application

Suitable for either indoor or outdoor installation.

7. Highest Pressure

The maximum input pressure is 10 Bar.

Spring mounting form for spring return actuators

Note

Make sure that the torque necessary to operate the valve is compatible with the actuator torque (it depends on both actuator type and air supply). Please note that the requested torque depends not only on the valve, but on the working conditions and the safety margins of the plant in question, too.

Mounting Connection and Dimension

TBNS Series Actuator Dimension Table

Model	A	B	C	D	AND	F	G	H	I	N	J	K	L	M	Air Connection
TBNS-052	146	72	45	92	47	32	13	80	30	11	Φ50	Φ36	M6*10	M5*8	G1/4″
TBNS-063	173	88	50	108	54	39	18	80	30	14	Φ70	Φ50	M8*13	M6*10	G1/4″
TBNS-075	184	99.5	60	119.5	61.5	44	19	80	30	14	Φ70	Φ50	M8*13	M6*10	G1/4″
TBNS-083	211	108	65	128	65.5	48	19	80	30	17	Φ70	Φ50	M8*13	M6*10	G1/4″
TBNS-092	262	118	65	138	73	52.5	22	80	30	17	Φ70	Φ50	M8*13	M6*10	G1/4″
TBNS-105	270	133	70	153	77	60	26	80	30	22	Φ102	Φ70	M10*15	M8*13	G1/4″
TBNS-125	302	155	80	185	87	69.5	27	130	30	22	Φ102	Φ70	M10*15	M8*13	G1/4″
TBNS-140	394	172	90	202	95.5	77	32	130	30	27	Φ125	Φ102	M12*20	M10*16	G1/4″
TBNS-160	456	198	100	228	106	89	32	130	30	27	Φ125	Φ102	M12*20	M10*16	G1/4″
TBNS-190	528	230	120	260	131	104	40	130	30	36	Φ140	-	M16*24	-	G1/4″
TBNS-210	532	255	140	285	140	115	40	130	30	36	Φ140	-	M16*24	-	G1/4″
TBNS-240	608	292	160	322	160	134	48	130	30	46	Φ165	-	M20*28	-	G1/4″
TBNS-270	714	331	160	361	180	147	48	130	30	46	Φ165	-	M20*28	-	G1/2″
TBNS-300	783	354	176	384	194	160	60	130	30	46	Φ165	-	M20*25	-	G1/2″
TBNS-350	926	414	215	444	227	188	60	130	30	55	Φ165	-	M20*25	-	G1/2″
TBNS-400	940	464	220	491	227	246	60	130	30	55	Φ254	Φ165	M16*25	M20*25	G1/2″

Mounting Standard

Frequently Asked Questions (FAQ)

What materials are used for the TBNS Series pneumatic actuators?

The body and main components are manufactured from ASTM316L, 316, or 304 stainless steel with an electro-polish finish to provide excellent resistance against corrosive chemicals and harsh industrial atmospheres.

What safety factor should be used when sizing these actuators?

For double acting actuators, the suggested safety factor under normal working conditions is 20%-30%. For spring return actuators, a safety factor of 30%-50% is recommended.

What are the operating media and pressure limitations?

The actuators operate using dry or lubricated air, non-corrosive gases, or oil. The operating pressure range is 2 to 8 Bar for both double acting and spring return configurations, with a maximum input pressure limit of 10 Bar.

What are the temperature limits for standard and specialized configurations?

Standard configurations operate between -20℃ to +80℃. For extreme environments, low-temperature versions support -40℃ to +80℃, and high-temperature versions support -20℃ to +150℃.

Do the TBNS Series actuators comply with international mounting standards?

Yes, they fully conform to the latest ISO5211, DIN3337, and NAMUR specifications, ensuring easy mounting and interchangeability of solenoids, limit switches, and other accessories.

Can the travel angle of the actuator be adjusted?

Yes, the two independent external travel stop adjustment bolts allow precise adjustment of ±5° (or ±4° depending on specific mounting standards) at both the open and closed directions.