Declutchable Manual Override

Description of Manual Override

The Valve Handwheel Mechanism is combined with the pneumatic actuator assembly to realize manual or pneumatic drive for butterfly valves, ball valves, etc. which are opened at 90° degrees

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Components and Material of Manual Override

No	Name	Material Sctence	No	Name	Material Sctence
1	Drive Spindle	Alloy Steel	10	Plane Bearing	Alloy Steel
2	Seal Ring	Nitrile Rubber	11	Clutch Handle	Stainless Steel (304)
3	Reed Spring	Stainless Steel (304)	12	Eccentric Sleeve	Alloy Steel
4	Upper Cover	Aluminium Alloy	13	Seal Ring	Nitrile Rubber
5	A Fastening	Stainlees Steel (304)	14	Worm	Alloy Steel
6	Limit Rod	Stainlees Steel (304)	15	Transmission Rod	Alloy Steel
7	Seal Ring	Nitrile Rubber	16	Box	Aluminium Alloy
8	Seal Ring	Nitrile Rubber	17	Copper Sleeve
9	Worm Gear	Ductile Iron (QT450)	18	Handwheel	Steel Stamping

Features of Declutch Manual Override

It is small in size , light in weight and reasonable in design

Products are serialized and output torque is matched with pneumatic devices

Turbine connection holes have two keyways 90 degrees apart so that users can choose the relative position of the device

with the valve according to their needs

Lifting the limit pulling ring, rotating the eccentric device 90 degree limit pin automatic limit, to achieve pneumatic, otherwise to achieve manual

Product factory, equipped with special grease, and valve assembly, the overall seal, dust-proof, waterproot, protection .

Dimension of Declutchable Handwheel Mechanism

Model	A	B	C	D	E	F	G	H	N	W	J	K	L	M	Handwheel Outer Diameter	Reference Weight (Kg)
SD-01	F07	57	F05	14×14	15	105	20	14×14	115	89.5	F07	F05	180	71	180	3.1
SD-02	F10	70	F07	17×17	19	110	22	17×17	135	125	F10	F07	220	92.3	200	4.6
SD-03	F12	89	F07/F10	22×22	22	130	28	22×22	160	136	F12	F10	257	113	280	7.2
SD-04	F14	108	F10/F12	27×27	28	165	32	27×27/36×36	200	187.5	F14	F10/F12	330	147.8	320	13.9
SD-05	F16	/	F12/F14/F16	36×36/46×46	38	185/187	40	36×36/46×46	244/275	220/260	F16	F14	410	169	400	25.2
SD-06	F16	/	F14/F16	46×46	48	200/197	50	46×46	282/325	251/292	F16	/	490	187	500	35

Ordering Instructions

To place an order with YUECHI for automotive solutions for valve applications, adhere to the following guidelines:

Valve

Specify the type of valve (e.g., ball valve, globe valve). Provide information on operational pressure. Specify valve size. Indicate the type of sealing (hard-sealed or soft-sealed). Clearly state the media the valve will handle. Specify the operating temperature.

Pneumatic Actuator

Choose between double-acting and spring-return configurations. Specify whether normally closed or normally open options are needed.

Solenoid Valve Type

Indicate whether a double-solenoid or single-solenoid valve is required. Specify the supply voltage. Specify if an explosion-proof type is necessary.

Limited Switches Box Type

Choose between a basic or explosion-proof type.

Valve Positioner Type

Specify the current signal type. Specify the air supply signal type. Indicate if electric-pneumatic converters are required. Specify the desired explosion-proof grade.

Air Filter & Regulator

Specify requirements for the air filter. Specify requirements for the solenoid valve. Specify requirements for the limit switches box.

Manual Gear Operator

Specify if a declutchable worm gear operator is required.

Customized Solutions

Provide details about any specific accessories required from a designated brand.

Once this information is gathered, contact YUECHI’s sales or customer service department to place your order. Ensure all specifications are accurately communicated to receive the most suitable automotive solutions for your valve applications.