>Application Versatility—Direct Action & Reverse Action in six sizes are available for an extensive variety of applications. Spring ranges, stroke limits, and manual overrides are available for nearly any control valve application.
>Excellent Linearity Between Loading Pressure and Stroke — A molded diaphragm travels in a deep diaphragm casing, the effective area of the diaphragm changes very small, which provides excellent linearity.
>High Thrust Capability—The molded diaphragm and cold stamping case allows high pressure supply and maximum thrust for given diaphragm size.
>Long Service Life—cold punched sheet metal casing cap and ductile iron construction provides increased stability and protection from corrosion and deformation should over-pressurization occur.
>Positive Connections—A split block stem connection provides a solid transfer of motion while allowing easy mounting. The absence of linkages helps to avoid lost motions and inaccurate valve positioning.

Actuator size	Effective Diaphragm Area cm²	Air Supply Kpa G	Spring range Kpa G	Output thrust N
220	188.8	400	120~300	2177
270	314.3	400	120~300	3648
350	555.8	400	120~280	6472
450	956.8	400	120~280	11180
550	1548.8	400	120~280	18028
650	2236.3	300	80~200	16475
650	2236.3	400	120~280	26050

Actuator Size	Stroke（mm）
	20	25	30	40	50	60	70	80	90	100	110
220	0.7
270	1.31	1.46	1.6
350	2.25	2.52	2.78	3.3
450S	4.18	4.64	5.09	6
450L					7.28	8.18	9.09	10	10.91
550S			8.1	9.6	11.6	13	14.5
550L								16	17.4	19.1	21
650S			22.75	24.83	26.92	29
650L							32.67	34.75	36.83	38.92	41

Part	1	2	3	4	5	6	7
Content	Series	Size	Stroke	Drive Rod Position	Air Supply/Spring Range	Manual Override	Ambient Temperature
Code	HPD	220	12	O（Air to Close. FO）	3（300/80-200KpaG）	N-None	1-standard（-10～70℃）
		270	16	C（Air to Open. FC）	4（400/120-300KpaG）	M-Side handle  manual.	3-High temp.（0～100℃）
		350	20	S（Special）	5（400/120-280KpaG）	S-Special	5-Low temp.（-40～40℃）
		450	25
		550	……
		650	110
Example：HPD-550*110-O3M1