67/68 Pneumatic Fork Actuator_Meisonilan Valves (Suzhou) Co., Ltd.

Assembly diagram and parts list of 67/68 pneumatic fork actuator

Serial Number	Part Description	Material Standard
1	Cylinder Rear End Cover	QT500-7
2 3	Stud Bolt Cylinder Tie Rod	C45 Alloy Steel
4	Cylinder Front End Cover	QT500-7
5	Upper Cover	HT200
6 7	Cylinder Head (Body) Indicator Shaft	QT500-7 C45
8	Shaft Cover	HT200
9	Indicator Plate	AL
10	O-ring	NBR
11	Sliding Bearing	H62
12	O-ring	NBR
13	Roller Sleeve	GCr15
14	Pin Shaft	GCr15
15	Torsion Adjustment Indicator Rod	45
16	Worm	45
17	Labor-Saving Mechanism	/
18	Support Arm	45
19	Spring Seat Tie Rod	45
20	Spring Module	/
21	Hydraulic Module	/
22	Worm Gear Screw	C45
23	Spring Seat	C45
24	Right End Cover	Carbon Steel
25	Rear Pressure Cover	C45
26	Guide Block	QT500-7
27	O-ring	NBR
28	Fork Shaft	Carbon Steel
29	Box Body	Carbon Steel
30	Adjusting Bolt	C45-Ni
31	Wire Retaining Ring for Hole	65Mn
32	Sliding Bearing	H62
33	O-ring	NBR
34	Piston	Carbon Steel
35	O-ring	NBR
36	Guide Ring	PTFE
37	Cylinder Block	C20
38	O-ring	NBR
39	Handwheel	DI

67/68 Pneumatic Fork Operator Output Torque Table

Single acting torque output (metric unit: Nm)
*The biggest feature that distinguishes this actuator from other products is that its patented spring module can adjust the output torque appropriately.

Gas source pressure model	4 Bar		5 Bar		6 Bar		Spring reset torque		Optional manual device
Gas source pressure model	0° Starting point	90° End	0° Starting point	90° End	0° Starting point	90° End	0° End	90° Starting point	Optional manual device
MN16-300			2194	1034	2972	1812	1700	2860	Handwheel (HW)
MN16-350	2850	1690	3880	2720			1700	2860
MN25-350			3809	2383	5118	3692	2734	4160
MN25-450	4191	2765	5922	4496			2734	4160
MN30-500			9352	6551	12525	9724	6514	9315	Manual hydraulic pump (HY)
MN30-550	9100	6300	12700	9900			5700	8500
MN35-550			14393	8751	18913	13271	8207	13849
MN35-600	13493	7851	18103	12461			8207	13849
MN35-700	21177	11174	29665	19669	38161	28157	12786	22789
MN40-800	35000	25600	47000	36000			18098	27523

Double acting torque output of fork pneumatic actuator (metric unit: Nm)

Gas source pressure model	4Bar		5Bar		6Bar		7Bar		可选手动装置
Gas source pressure model	Start	Working	Start	Working	Start	Working	Start	Working	可选手动装置
MN16-300	3115	1869	3894	2362	-	-	-	-	离合式手轮机构
MN16-350	4550	2730	-	-	-	-	-	-	离合式手轮机构
MN25-350	5235	3141	6543	3926	7852	4711	-	-	离合式手轮机构或手动液压泵（HY）
MN25-400	6925	4155	8656	5194	10388	6233	-	-	离合式手轮机构或手动液压泵（HY）
MN25-450	8412	5047	10515	6309	12618	7571	-	-	手动液压泵(HY)
MN30-450	10280	6168	12580	7548	15420	9252	-	-
MN30-500	12693	7616	15866	9520	-	-	-	-
MN30-550	14800	8880	18400	11040	22080	13248	-	-
MN35-550	18080	10848	22600	13560	27120	16272	31640	18984
MN35-600	21700	13020	26310	15786	31572	18943	-	-
MN35-500DA2	33964	24021	42455	30026	50946	36031	59437	42036
NM40-600DA2	59778	42276	74723	57095	89668	63414	104612	73984

Appearance dimensions of fork pneumatic actuator

Model	D	L	L1	L2	H	E	E1	E2	D1	H1	B	T	D2	N	M1	M2	X	Y	M3	单重KG DA/SR手动	手动装置
MN16-300	365	1628	513	688	107	75	130	280	80	150	22	82	165	4	M20	RC1/2	65	100	M6	150/328	手轮 HW
MN16-350	415	1628	513	688	107	75	130	280	80	150	22	82	165	4	M20	RC1/2	65	100	M6	150/328	手轮 HW
MN25-350	415	1903	615	823	103	90	165	295	100	175	28	106	254	8	M16	RC1/2	65	100	M6	340/480	手轮/ HW
MN25-400	465
MN25-450	515
MN30-450	515	2335	715	960	137	110	185	368	120	235	32	127	298	8	M20	RC3/4	70	140	M8	400/ 825	手动 HY
MN30-500	585
MN30-550	620
MN35-550	620	2960	920	1230	155	143	220	453	160	261	40	169	356	8	M30	RC3/4	70	140	M8	640/ 1400	手动 HY
MN35-600	685
MN35-700	750

Switching time and air consumption of fork pneumatic actuator

Double action	Model	Cylinder diameter	Trip	Piston rod diameter	Single Trip Time (seconds)	Gas consumption (L/min)	Open (gas consumption L)	Off (gas consumption L)	One cycle gas consumption (L)
	MN16-300DA	300	179	32	20	155.6	14.06	11.22	15.28
	MN16-350DA	359	179	32	20	222.8	20.14	16.71	25.28
	MN25-350DA	359	214	38	20	266.4	23.68	19.65	43.33
	MN25-400DA	410	214	38	20	347.5	30.89	26.25	57.14
	MN25-450DA	450	214	38	20	418.6	37.21	32.11	69.32
	MN30-450DA	450	262	45	20	512.5	44.85	38.69	83.54
	MN30-500DA	500	262	45	20	632.7	55.37	48.5	103.87
	MN30-550DA	540	262	45	20	738	64.58	57.15	121.73
	MN35-550DA	540	342	55	20	963.4	82.9	73.37	156.27
	MN35-600DA	600	342	55	20	1189.3	102.35	91.72	194.07
	MN35-700DA	700	342	55	20	1618.8	139.31	126.66	266.17

Single action	Model	Cylinder diameter	Trip	Piston rod diameter	Single Trip Time (seconds)	Gas consumption (L/min)	Open (gas consumption L)	One cycle gas consumption (L)
	MN16-350-S4/5	359	179	32	20	222.8	16.71	16.71
	MN25-400-S4/5	410	214	38	20	347.5	26.25	26.25
	MN30-550-S4/5	540	262	45	20	738	57.15	57.15
	MN35-600-S4/5	600	342	55	20	1189.3	91.72	91.72
	MN16-300-S6	300	174	32	20	151.2	10.94	10.94
	MN25-350-S5/6	359	214	38	20	266.4	19.65	19.65
	MN30-500-S5/6	500	262	45	20	632.7	48.5	48.5
	MN35-550-S5/6	540	342	55	20	963.4	73.37	73.37

Valve Installation:
(1) Before installation, check that the product model, tag number, and specifications match the requirements. Inspect the entire valve for missing or loose parts.
(2) Prior to installation, clean the pipeline. Ensure there is sufficient straight pipe section at the valve inlet and install a filter. When connecting the valve body to the pipeline flanges, ensure coaxiality.
(3) Thoroughly clean the pipeline before installing the valve.
(4) The installation site should ensure the safety of personnel and equipment, facilitating operation, disassembly, and maintenance.
(5) The valve should be installed vertically upright on horizontal pipelines. If necessary, it can be installed at an angle, but horizontal installation should be avoided. For occasions with heavy valve weight or vibration, use a support frame.
(6) The medium flow direction must align with the arrow on the valve body. The air supply should be dry and oil-free. The valve should be used in environments with temperatures ranging from -20℃ to 55℃.

Valve Maintenance:
(1) Cleaning the Valve: For general media, cleaning with water is sufficient. For media harmful to health, first understand their properties and then select an appropriate cleaning method.
(2) Disassembly: Remove rust from exposed rusted parts first. Before derusting, protect the machined surfaces of precision parts such as the valve seat, valve plug, valve stem, and push rod. Use special tools when disassembling the valve seat.
(3) Valve Seat: Minor rust or wear on the sealing surface can be repaired by machining. If damage is severe, replace the seat. However, both repaired and replaced hard sealing surfaces must be lapped.
(4) Valve Stem: If the surface is damaged, it must be replaced.
(5) Damage to Push Rod, Guide, and Sealing Surfaces: Reverse-acting actuators must be replaced; direct-acting actuators can be reused after proper repair.
(6) Compression Spring: If there are cracks or other defects affecting strength, replace it immediately.
(7) Wear Parts: Packing, gaskets, and O-rings must be replaced entirely during each maintenance. Check the valve plug and diaphragm for cracks, aging, or corrosion that may cause future failures. Decide whether to replace them based on inspection results, but the diaphragm service life should not exceed 2-3 years.
(8) When reassembling the valve, ensure alignment. Tighten bolts diagonally and lubricate sliding parts. After reassembly, debug the valve according to the factory test items and methods. During this period, accurately adjust the packing compression force and the valve plug closing position.

When placing an order, please fill in the Specification Sheet or specify the following information:

If the model has not been selected before ordering, please provide us with the operating parameters:
(1) Nominal diameter DN (mm);
(2) Nominal pressure (MPa or bar);
(3) Fluid properties (including medium temperature, viscosity, or acidity/alkalinity);
(4) Pressure before and after the valve (pressure differential);
(5) Requirements for flow characteristics;
(6) Materials of valve body and valve core;
(7) Connection type;
(8) Driving method (provide air supply pressure, driving voltage);
(9) Supporting accessories (for pneumatic valves, it is recommended that users install an air filter triplet and a 2-position 5-way solenoid valve);
(10) On-site working conditions.
If the product model of our company has been selected by the design unit, please order directly from our production department according to the model;
When the application occasion is very important or the pipeline is relatively complex, please provide the design drawings and detailed parameters as much as possible, and our experts will review and check them for you.