Pneumatic Piston Actuator-Pneumatic Actuator-Suzhou Delan Energy Science & Technology Co.,Ltd

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Pneumatic Actuator

Pneumatic Piston Actuator

1. Overview

This series is a pneumatic piston actuator with large output force and high performance. It is used in combination with straight-stroke control valves, including globe valves, cage valves, gate valves, etc. The design of this series of actuators can make the control valve reliable on-off or regulating control.

This series of actuators are divided into two types, single-acting and double-acting. Single-acting actuators are divided into two types, direct-acting (GD-Z) and counter-acting (GD-F). They are spring-loaded cylinder-type actuators; and double-acting (GD-F) -D) The actuator is a cylinder type actuator that is controlled by air pressure without spring loading, and its mechanism positions the valve core according to the constantly changing pneumatic loading pressure on the cylinder.

See the figure on the right for an example of a pneumatic piston actuator.

Installation example

2. Standard Specification

Series		GD
Specification		20、30、31、40、41、42、43、50
Output Method		Straight stroke
Action		Double acting: GD-D Single action: GD-Z (positive action), GD-F (reverse action)
Maximum output thrust		See table 1
Stroke		See table 1
Air pressure		600Kpa
Piping interface		Please refer to pages 8-12
Ambient temperature		Standard type: -40℃～82℃ Special type (optional): -18℃～149℃, -54℃～149℃
Spring range		Positive effect:20～100Kpa、80～200Kpa Reaction:140～260Kpa、200～300Kpa
Material of main parts	Standard	Upper and lower cover plates: Steel Sealing ring: Viton O-ring: Nitrile rubber, Stroke indicator: stainless steel Pointer: stainless steel Actuator spring: spring steel, Actuator guide rod: steel Wafer block: galvanized steel surface Bracket: cast iron, Piston: Steel Pillar: Steel Cylinder: Steel, Hand wheel: ductile iron
	Special type	Sealing ring, O-ring: Viton (-18℃～149℃), silicone synthetic rubber (-54℃～149℃), Upper and lower cover: stainless steel Actuator guide rod: stainless steel Column: stainless steel, Piston: Stainless Steel Cylinder: Stainless Steel
Painting color		Orange
Attachment		Positioners, air filter pressure reducers, limit switches, solenoid valves, retaining valves, amplifiers, etc.
Optional equipment		Manual operating mechanism, special air piping and special air joints, high temperature environment, low temperature environment, salt corrosion type, designated coating color, etc.

Figure 1 Structure

Figure 1-1 Double acting

Figure 1-2 Single acting

GD-Z type (positive acting-air shut type) GD-F type (reaction-air open)

Table 1 Output thrust, stroke and weight

Executive agency			Rated stroke (mm)	Effective area of cylinder(cm2)	Turn off the thrust(kgf)	Spring pressure(Kpa)	Operating pressure(Kpa)	Approximate weight(kg)
Types	Series	Specification	Rated stroke (mm)	Effective area of cylinder(cm2)	Turn off the thrust(kgf)	Spring pressure(Kpa)	Operating pressure(Kpa)	Without handwheel	Top loading handwheel	Side-mounted handwheel
GD-Z	22	20	38	380	1520	20～100	600	32	45	65
	33	30	51	706	2824			56	64	72
	33	31	76	706	2824			61	69	77
	44	40	76	1385	5540			92	105	123
		41	102					98	111	129
		42	127					103	116	134
		43	200					112	125	143
	55	50	200	2289	9156			123	142	156
GD-Z-T	22	20	38	380	1216	80～200	600	33	46	66
	33	30	51	706	2259			57	65	73
	33	31	76	706	2259			62	69	78
	44	40	76	1385	4432			93	106	124
		41	102					99	112	130
		42	127					105	118	136
		43	200					114	127	145
	55	50	200	2289	7325			125	144	158
GD-F	22	20	38	380	760	200～300	600	33	46	67
	33	30	51	706	1412			58	65	73
	33	31	76	706	1412			64	71	79
	44	40	76	1385	1939	140～260		93	107	125
		41	102					99	113	131
		42	127					106	120	138
		43	200					117	131	149
	55	50	200	2289	3204			125	144	159
GD-D	22	20	38	380	1900	Without spring	600	30	43	63
	33	30	51	706	3530			54	65	70
	33	31	76	706	3530			57	68	73
	44	40	76	1385	6925			90	103	121
		41	102					94	107	125
		42	127					97	110	128
		43	200					104	117	135
	55	50	200	2289	11445			115	137	148

Three, other configurations can be provided

Top/side mounting handwheel

To meet manual operation in emergency situations, the GD type actuator can be equipped with a top-mounted or side-mounted handwheel assembly.

The fixed handwheel on the GD type actuator can be used to set the travel limit in the upward direction. The handwheel of GD-Z type actuator rotates clockwise to make the actuator push rod move downward to compress the spring; when the handwheel rotates counterclockwise, the action of the spring pushes the push rod back. For the GD-F type actuator, counterclockwise rotation will move the push rod upward; when it is rotated clockwise, the spring will push the push rod downward.

The side-mounted handwheel on the GD type actuator locates the handwheel on one side of the bracket. Through the worm gear drive, the handwheel drive can also be used as a stroke limiter.

Four, model preparation instructions

Example: Model: GD44-Z-S

Means: Positive-acting actuator, 44 cylinder, with top-mounted handwheel

Figure 2 Standard piping circuit

Figure 2-1 Positioner automatic control

Figure 2-1A Double acting

Figure 2-1B Single-acting-positive acting

Figure 2-1C Single-acting-Counter-acting

Figure 2-2 Automatic control of positioner and solenoid valve

Figure 2-2A Double acting

Figure 2-2B Single acting (positive acting)

Figure 2-2C Single action (reverse action)

GD type no handwheel mechanism

Size Unit：mm

Series	Specification	Rated stroke	φB	C	φD	E	φF	G	H	H3 (Off)	φK	Air supply piping interface
22	20	38	71	24	13.5	15	138	170	429	123	285	1/4"NPT
33	30	51	90	35	20	15	160	204	528	172	385	1/2"NPT
33	31	76	90	35	20	15	160	204	755	172	385	1/2"NPT
44	40	76	90	35	20	15	200	246	845	186	520	3/4"NPT
	41	102	90	35	20	15	200	246	930	186	520	3/4"NPT
	42	127	90	35	20	15	200	246	980	186	520	3/4"NPT
	43	200	90	35	20	15	200	246	1157	186	520	3/4"NPT
55	50	200	90	35	20	15	200	260	1981	186	660	3/4"NPT

Note: 1. M1 thread size: GD22 series are 3/4"-16UNF; GD33, GD44, GD55 series are 1-1/8"-12UNF;

2. M2 thread size: GD22 series are 1/2"-20UNF; GD33, GD44, GD55 series are 3/4"-16UNF.

GD top mounted handwheel mechanism

Size Unit：mm

Series	Specification	Rated stroke	φB	C	φD	E	φF	G	H	H1	H3 (Off)	φK	φW	Air supply piping interface
22	20	38	71	24	13.5	15	138	170	429	680	123	285	250	1/4"NPT
33	30	51	90	35	20	15	160	204	528	780	172	385	280	1/2"NPT
33	31	76	90	35	20	15	160	204	755	1150	172	385	280	1/2"NPT
44	40	76	90	35	20	15	200	246	845	1240	186	520	400	3/4"NPT
	41	102	90	35	20	15	200	246	930	1360	186	520	400	3/4"NPT
	42	127	90	35	20	15	200	246	980	1360	186	520	400	3/4"NPT
	43	200	90	35	20	15	200	246	1157	1650	186	520	400	3/4"NPT
55	50	200	90	35	20	15	200	260	1981	2550	186	660	400	3/4"NPT

Note:

1. M1 thread size: gd22 series is 3 / 4 "- 16unf; Gd33, gd44 and GD55 series are 1-1 / 8 "- 12unf;

2. M2 thread size: 1 / 2 "- 20unf for gd22 series; Gd33, gd44 and GD55 series are 3 / 4 "- 16unf.

GD type side mounted handwheel mechanism

Size Unit：mm

Series	Specification	Rated stroke	φB	C	φd	E	φF	G	H	H1	H3 (Off)	φK	L	L1	φW
22	20	38	71	24	13.5	15	138	170	429	680	123	285	220	280	250
33	30	51	90	35	20	15	160	204	528	780	172	385	280	300	280
33	31	76	90	35	20	15	160	204	755	1150	172	385	280	300	280
44	40	76	90	35	20	15	200	246	845	1240	186	520	350	350	400
	41	102	90	35	20	15	200	246	930	1360	186	520	350	350	400
	42	127	90	35	20	15	200	246	980	1360	186	520	350	350	400
	43	200	90	35	20	15	200	246	1157	1650	186	520	350	350	400
55	50	200	90	35	20	15	200	260	1981	2550	186	660	380	350	400

Note:

1. M1 thread size: gd22 series is 3 / 4 "- 16unf; Gd33, gd44 and GD55 series are 1-1 / 8 "- 12unf;

2. M2 thread size: 1 / 2 "- 20unf for gd22 series; Gd33, gd44 and GD55 series are 3 / 4 "- 16unf;

3. Size of air supply piping interface: 1 / 4NPT for gd22 series, 1 / 2NPT for gd33 series, and 3 / 4NPT for gd44 and GD55 series.

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Pneumatic Piston Actuator

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