Switch-type Electric Actuator_Meisonilan Valves (Suzhou) Co., Ltd.

2.1 Housing

The housing is made of hard aluminum alloy, treated with anodizing and polyester powder coating, featuring strong corrosion resistance. It has a protection class of IP67, NEMA 4 and 6, with an IP68 type available as an option.

2.2 Motor

A fully enclosed squirrel-cage motor with small size, large torque, and low inertia. It has an insulation class of F and a built-in overheat protection switch to prevent damage caused by overheating.

2.3 Manual Structure

The handle is designed to be safe, reliable, labor-saving, and compact. When there is no power supply, manual operation can be performed by turning the handle. When manual operation is not needed, the handle can be placed in the handle holder for easy access.

2.4 Indicator

The indicator is mounted on the central shaft, allowing observation of the valve position. The lens is designed as a convex lens, which does not accumulate water, making observation more convenient.

2.5 Dryer

It is used to control temperature, prevent moisture condensation inside the actuator due to changes in temperature and weather, and keep internal electrical components dry.

2.6 Sealing

It has excellent sealing performance. The standard product has a protection class of IP67, with an optional IP68 protection class.

2.7 Limit Switches

Dual mechanical and electronic limits. The mechanical limit screws are adjustable, ensuring safety and reliability; the electronic limit switches are controlled by a cam mechanism, and the simple adjustment mechanism enables precise and convenient position setting without being affected by excessive handwheel rotation.

2.8 Self-locking

The precision worm gear mechanism can efficiently transmit large torque with high efficiency, low noise (maximum 50 decibels), and long service life. It has a self-locking function to prevent reverse rotation, and the transmission part is stable and reliable without the need for re-lubrication.

2.9 Anti-drop Bolts

When the housing is removed, the bolts remain attached to the housing and will not fall off.

2.10 Installation

The bottom mounting dimensions comply with the ISO5211/ DIN3337 international standards. The holes are in a double square shape, facilitating linear or 45° angle installation of valves with square stems, and have strong adaptability. It can be installed either vertically or horizontally.

2.11 Circuitry

The control circuit complies with single-phase or three-phase power supply standards. The circuit layout is compact and reasonable, and the terminals can effectively meet the requirements of various additional functions.

Main Technical Parameters

Model	Maximum output torque	90 ° action time	Output shaft		Electrical machinery	Single phase rated current	Weight
	Maximum output torque	90 ° action time	Square	Round	Electrical machinery	Single phase rated current	Weight
	N·M	S	mm		W	220V	Kg
MS-005	50	30	11×11	Φ12.6	10	0.25	3.6
MS-005	50	30	14×14	Φ12.6	10	0.25	3.6
MS-008	80	30	11×11	Φ15.7	10	0.25	3.6
MS-008	80	30	14×14	Φ15.7	10	0.25	3.6
MS-010	100	30	14×14	Φ15.7	15	0.35	4.6
MS-010	100	30	17×17	Φ18.95	15	0.35	4.6
MS-015	150	30	14×14	Φ18.95	15	0.37	4.6
MS-015	150	30	17×17	Φ18.95	15	0.37	4.6
MS-020	200	30	22×22	Φ22.13	45	0.3	13
MS-030	300	30	22×22	Φ28.48	45	0.31	13.4
MS-040	400	30	22×22	Φ28.48	60	0.33	13.8
MS-060	600	30	27×27	Φ31.65	90	0.33	14
MS-080	800	45	27×27	Φ31.65	180	0.47	14.3
MS-100	1000	135	27×27	Φ31.65	180	0.47	60
MS-160	1600	135	Max φ65		180	0.85	60
MS-200	2000	135	Max φ65		180	0.85	60
MS-300	3000	135	Max φ65		180	0.85	60

Technical Parameters of Standard Parts

Enclosure	Waterproof rating: IP67, NEMA 4 and 6
Motor power supply	110/220V AC single-phase, 380/440V AC three-phase, 50/60Hz, ±10%
Control power supply	110/220V AC single-phase, 50/60 Hz, ±10%
Control signal	Input and output: 4 - 20mA
Motor	Squirrel-cage asynchronous motor
Limit switch	2 x Open/Close, SPDT, 250V AC 10A
Auxiliary limit switch	2 x Open/Close, SPDT, 250V AC 10A
Stroke	90° ± 10° (180°/270° optional)
Fail-safe/Operating temperature	Built-in overheat protection, On: 120℃ ± 5℃ / Off: 97℃ ± 5℃
Indicator	Continuous position indication
Manual operation	Mechanical handle
Self-locking device	Worm gear and worm mechanism provide self-locking
Mechanical limit	2 external adjustment bolts
Dryer	7 - 10W (110/220V AC) for anti-condensation
Wiring hole	2 x M18
Ambient temperature	-20℃ - +70℃
Lubrication	Aluminum-based grease (EP type)

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.