High-performance Compact Scotch Yoke Pneumatic Actuator

Compact Scotch Yoke Pneumatic Actuator introduction

Scotch Yoke type pneumatic actuators usually refer to “single-cylinder double-piston-variable-torque fork type” pneumatic actuators, which are a range of piston-type actuators and are suitable for valves with a 90 ° angle (such as ball valves, butterfly valves, Stop valve or metering control).

Compact Scotch Yoke Pneumatic Actuator Features

CE certificate and According with international Standards, such as NAMUR,ISO5211 and DIN. Integrated Design with Stable Quality. Dual Piston rack and Pinion Design with High Output Power. Multi-position Indicator, On-site Visual Instruction. Large operating force, Small flow resistance. Novel Valve Body Design. Large rated flow coefficient, large allowable pressure difference and excellent sealing performance.

Product	Compact Scotch Yoke Pneumatic Actuator
Structure	Compact Scotch Yoke Pneumatic Actuator
Rotary Angle	0-90 Degree
Air Supply Pressure	2.5-8 Bar
Actuator Body Material	Aluminum Alloy, Stainless Steel, Carbon Steel.
Surface Treatment	Hard Anode Oxidation
Operating Temperature	Standard Temperature:-20℃ ~ 80℃ Low Temperature:-15℃ ~ 150℃ High Temperature:-35℃ ~ 80℃
Connection Standard	Air interface: NAMUR Mounting Hole: ISO5211 & DIN3337(F03-F25)
Application	Ball Valve, Butterfly Valve & Rotary Machines

Components & Materials of Compact Scotch Yoke Pneumatic Actuator

No.	Parts Name	Material
1	Cylinder	Aluminium Alloy
2	Piston	Aluminium Alloy
3	Shaft	Alloy Steel
4	Yoke	Alloy Steel
5	Piston pin	Alloy Steel
6	Yoke pin	Alloy Steel
7	Bearing	Alloy Steel
8	Upper circlip	Stainless Steel
9	Lower circlip	Stainless Steel
10	Upper washer	Crystalline Polymer
11	Lower washer	Crystalline Polymer
12	Upper shaft O-ring	NBR
13	Lower shaft O-ring	NBR
14	Upper shaft bearing	Crystalline Polymer/Graphite Copper Bushing
15	Lower shaft bearing	Crystalline Polymer/Graphite Copper Bushing
16	Upper piston bearing	Crystalline Polymer
17	Lower piston bearing	Crystalline Polymer
18	Piston ring	Crystalline Polymer
19	Piston O-ring	NBR
20	Piston support chip	Crystalline Polymer
21	Connection plate O-ring	NBR
22	Connection plate	Aluminium Alloy
23	Plate socket screw	Stainless Steel
24	Cover socket screw	Stainless Steel
25	Nut O-ring	NBR
26	screws	Stainless Steel
27	End Cover Seal Ring	NBR
101	Cover	Aluminium Alloy
102	Spring	Spring Steels
103	Lower Spring Washer	Aluminium Alloy
104	Spring Shaft	Stainless Steel
201	Double Acting End Cover	Aluminium Alloy
202	Set Screw	Stainless Steel

Compact Scotch Yoke Pneumatic Actuator Operation Demonstration

Compact Scotch Yoke Pneumatic Actuator Torque Spring Return (N.m.)

Compact Scotch Yoke Pneumatic Actuator Torque Double Acting (N.m.)

Air Supply	3bar			4bar			5bar			5.5bar			6bar			7bar			8bar
Size	α=0°	α=45°	α=90°	α=0°	α=45°	α=90°	α=0°	α=45°	α=90°	α=0°	α=45°	α=90°	α=0°	α=45°	α=90°	α=0°	α=45°	α=90°	α=0°	α=45°	α=90°
DA40	16	7	12	22	9	17	27	12	21	31	13	23	33	14	25	38	16	29	44	19	33
DA70	90	39	68	120	52	91	150	65	113	168	72	127	180	78	136	210	90	159	240	103	181
DA80	145	63	110	194	83	146	242	104	183	271	117	205	290	125	220	339	146	256	387	167	293
DA90	216	93	164	288	124	218	361	155	273	404	174	305	433	186	327	505	218	382	577	249	436
DA100	318	137	241	424	183	321	530	228	401	594	256	449	636	274	481	742	320	561	849	366	641
DA125	544	235	412	726	313	549	907	391	686	1016	438	768	1089	469	823	1270	547	960	1452	626	1098
DA140	771	332	583	1028	443	777	1285	553	971	1439	620	1088	1541	664	1165	1798	775	1359	2055	886	1554
DA160	1166	502	881	1554	670	1175	1943	837	1469	2176	937	1645	2331	1004	1762	2720	1172	2056	3108	1339	2350
DA180	1626	700	1229	2168	934	1639	2710	1167	2048	3035	1308	2294	3252	1401	2458	3793	1634	2868	4335	1868	3277
DA220	3013	1298	2278	4018	1731	3037	5022	2164	3796	5625	2423	4252	6027	2597	4556	7031	3029	5315	8035	3462	6074
DA260	6192	2668	4681	8256	3557	6241	10321	4447	7802	11559	4980	8738	12385	5336	9362	14449	6225	10922	16513	7114	12483

Pneumatic Actuator FAQ:

Q1: Pneumatic Valve can’t Move ? A1: Check the Solenoid Valve is normal or not; Test the actuator separately with air supply; Check the handle position. Q2: Pneumatic Actuator with slow motion ? A2: Check air supply is enough or not; Test the Actuator Torque is ok or not for the valve; Check Valve coil or other components are too tight or not; Q3: Reply Devices without Signal ? A3: Inspect and repair power circuit; Adjust the cam to correct position; Replace micro switches.