ADD Series Spring-opposed Diaphragm Actuators are designed to assemble with straight acting control valves. ADD actuator has direct action design, and is used to provide reliable on-off or throttling operation for control valves.
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ADD Series Diaphragm Actuators

ADD Series Spring-opposed Diaphragm Actuators are designed to assemble with straight acting control valves. ADD actuator has direct action design, and is used to provide reliable on-off or throttling operation for control valves.


Brief Introduction

ADD Spring-opposed diaphragm actuator is working with springbalance principle. When valve controller or valve positioned pneumatic output signals applied to the actuator diaphragm varying, the actuator change it into movement of valve stem, and   position the valve plug to its travel spot. All ADD actuators are direct acting. The applying air is pressured to the upper diaphragm case. When this loading pressure is increased, the actuator stem moving downward; when this loading pressure is  reduced, the opposing spring force moves the actuator stem upward.When the loading pressure fail, the spring forces the stem to the extreme upward position. ADD actuators provide failto-open action for push-down-to-close valves and fail-to-close action for push-down-to-open valves. Zero setting of the actuator is determined by the compression of the actuator spring. Span is set by both the actuator spring rate and the number of springs available.




Actuator Size Effective Diaphragm Area Yoke Boss Diameter  Stem Diameter Maximum Travel Max Allowable Thrust 1 Max  Casing Pressurefor A c t u a t o r  Max Diaphragm Casing Pressure
cm 2 mm  N1
Bar
300 297 54 9.5 19 10231 8.6 9.6
340 445 54 9.5 29 10231 4.5 5.2
400 445 71 12.7 38 12010 4.5 5.2
450 667 71 12.7 51 25132 3.4 4.1
460 1006 71 12.7 51 33584 2.8 3.4
500 667 90 19.1 51 25131 3.4 4.1
600 1006 90 19.1 51 30246 2.8 3.4
7002 1419 90 19.1 76 39142 3.8 4.5
102 3
--- 






800 1761 127 25.4 76 63392 3.4 4.1
31.8 880754 4.9 4 5.5 4
2
870
1419 127 25.4 76 39142 3.8 4.5
102 3
1000 2902 127H 5 31.8 102 200160 6.9 7.9
178 50.8

lnch 2 lnch Lb  Psig
300 46 2-1/8 3/8 3/4 2300 125 140
340 69 2-1/8 3/8 1-1/8 2300 65 75
400 69 2-13/16 1/2 1-1/2 2700 65 75
450 105 2-13/16 1/2 2 5650 50 60
460 156 2-13/16 1/2 2 7550 40 50
500 105 3-9/16 3/4 2 5650 50 60
600 156 3-9/16 3/4 2 6800 40 50
7002 220 3-9/16 3/4 3 8800 55 65
43
---






800 273 5 1 3 14150 50 60
1-1/4 19800 * 70* 80*
870 2 220 5 1 3 8800 55 65
4*
1000 450 5H* 1-1/4 4 45000 100 115
7 2
1. These valves are based on material limitations such as yoke, stem connection, diaphragm plate, and travel stop strengths.
2. Valves also apply to ADD-4" Actuators.
3. For ADD-4"actuator constructions.
4. Steel Construction.
5. H=Heavy actuator-to-valve bolting.




Actuator Size Clearance Volume 1 Travel (mm)
11 16 19 29 38 51 76 102
cm3 Casing Volume 2, cm3
300 540 918 1080 1180 --- --- --- --- ---
340 and 400 934 1470 1700 1850 2330 2790 --- --- ---
450 and 500 1560 --- 2790 3000 3720 4420 5410 --- ---
460 and 600 2180 --- 3880 4210 5280 6340 7740 --- ---
700 and 870 3490 5240 5950 6420 7830 9240 11110 14880 18570
800 4820 --- -- -- 10490 12450 14860 19340 ---
1000 10880 --- -- 16400 19170 21940 25630 33000 40380
Actuator Size lnch3 Travel (inch)
7/16 5/8 3/4 1-1/8 1-1/2 2 3 4
Casing Volume, lnch3
300 33 56 66 72 --- --- -- --- ---
340  and  400 57 90 104 113 142 170 --- --- ---
450  and  500 95 --- 170 183 227 270 330 --- ---
460,600 and 760 133 --- 237 257 322 387 472 --- ---
700  and  870 213 320 363 392 478 564 678 980 1133
800 294 -- -- -- 640 760 907 1180 ---
1000 664 -- -- 1002 1170 1339 1564 2014 2464
1. Clearance volume indicates casing volume at zero travel.
2. Includes clearance volume.
Travel Actuator Size Pressure  Range to Actuator Diaphragm Thrust Capabilities Travel Actuator Size Pressure Range to Actuator Diaphragm Thrust Capabilities
mm  Bar N lnch Psig Lb
19 300 0.2-1 2250 3/4 300 3-15  506
0.4-2 3890 6-30  874
340 0.2-1 3380 340 3-15  759
0.4-2 5830 6-30 1311
29 400 0.2-1 3380 1-1/8 400 3-15  759
0.4-2 5530 6-30 1242
450 0.2-1 4670 450 3-15  1050
0.4-2 8410 6-30  1890
460 0.2-1 6940 460 3-15 1560
0.4-2 13190 6-30 2964
38 500 0.2-1 5140 1-1/2 500 3-15 1155
0.4-2 8410 6-30 1890
600 0.2-1 6940 600 3-15 1560
0.4-2 13190 6-30 2964
51 700 0.2-1 7830 2 700 3-15  1760
0.4-2 18590 6-30  4180
800 0.2-1 10110 800 3-15 2272
0.4-2 18950 6-30  4260
870 0.2-1 6850 870 3-15 1540
0.4-2 18590 6-30  4180
76 1000 0.2-1 16010 3 1000 3-15 3600
0.4-2 32030 6-30  7200
102 0.2-1 12010 4 3-15  2700
0.4-2 22019 6-30  4950




Actuator Size Effective Diaphragm Area Yoke Boss Diameter  Stem Diameter Maximum Travel Max Allowable Thrust 1 Max  Casing Pressurefor A c t u a t o r  Max Diaphragm Casing Pressure
cm 2 mm  N1
Bar
300 297 54 9.5 19 10231 8.6 9.6
340 445 54 9.5 29 10231 4.5 5.2
400 445 71 12.7 38 12010 4.5 5.2
450 667 71 12.7 51 25132 3.4 4.1
460 1006 71 12.7 51 33584 2.8 3.4
500 667 90 19.1 51 25131 3.4 4.1
600 1006 90 19.1 51 30246 2.8 3.4
7002 1419 90 19.1 76 39142 3.8 4.5
102 3
--- 






800 1761 127 25.4 76 63392 3.4 4.1
31.8 880754 4.9 4 5.5 4
2 1419 127 25.4 76 39142 3.8 4.5
870 102 3
1000 2902 127H 5 31.8 102 200160 6.9 7.9
178 50.8

lnch 2 lnch Lb  Psig
300 46 2002/1/8 3月8日 3月4日 2300 125 140
340 69 2002/1/8 3月8日 2001/1/8 2300 65 75
400 69 2-13/16 1月2日 2001/1/2 2700 65 75
450 105 2-13/16 1月2日 2 5650 50 60
460 156 2-13/16 1月2日 2 7550 40 50
500 105 2003/9/16 3月4日 2 5650 50 60
600 156 2003/9/16 3月4日 2 6800 40 50
7002 220 2003/9/16 3月4日 3 8800 55 65
43
---






800 273 5 1 3 14150 50 60
2001/1/4 19800 * 70* 80*
870 2 220 5 1 3 8800 55 65
4*
1000 450 5H* 2001/1/4 4 45000 100 115
7 2
1. These valves are based on material limitations such as yoke, stem connection, diaphragm plate, and travel stop strengths.
2. Valves also apply to ADD-4" Actuators.
3. For ADD-4"actuator constructions.
4. Steel Construction.
5. H=Heavy actuator-to-valve bolting.

Features

Application Versatility

ADD diaphragm actuator has five types in 11 sizes (300,340,400,450,460,500,600,700,800,870&1000), Size 700 ~ 1000 offer two travel length (3” and 4”), available for almost all control valve applications. Excellent Linearity for Loading Pressure/Travel Customized springs ordered from USA, made by quality spring steel. All material can be traced. Physical and chemical properties pass through rigorous testing, excellent load characteristics and excellent stability. High Thrust Capability The diaphragm using the hydrodynamic design, using the U.S. patent material formulations and a unique double-coated process, pressure molding, with high thrust, high burst strength and stable and reliable longterm life. High Dynamic Stability and Fast Frequency Response The design of the diaphragm case has the smaller volume on pressure signal side, reduced the response time to a minimum. Meantime diaphragm head case is deeper to allow the diaphragm move in a large capacity, minimum diaphragm area changes throughout the whole stem travel. Normal Temperature and Cold Service Applications Excellent material ensure actuator’s performance with temperature down to -50C(-58 F). Consult HCV technical support when applications operating temperature below -40 C(-40 F). Rigid and simple construction The design of movement is passing through the stem connector components, which is reliable and easy to install, eliminating the effect of empty motion and valve inaccurate positioning. Variety of Accessories Available A variety of accessories are available, including limit switch, top-mounted hand wheel, side-mounted hand wheel, valve positioner, valve regulator, and other accessories and instrumentation.


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