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9907-004 WOODWARD Input module

Brand:  WoodWard

Model number:9907-004 

Colour:new                  

Warranty: 12 months

Lead Time:3-day working day   

Country of origin: USA Price: Please contact us         

Product weight:0.85kg

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

9907-004   WOODWARD

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Products Name: 9907-004 WOODWARD Input module

PRODUCT DESCRIPTION

Woodward has launched hardware and software updates to address many CIP requirements; however, complete NERC/CIP compliance involves more than the controls and is dependent on plant infrastructure and procedures. The physical security remains the user’s responsibility.

Benefits:

Compensation System 

If the pilot valve plunger is lowered, pressure oil flows to the bottom of the power 

piston pushing it up, lifting the terminal lever, which in turn rotates the output 

shaft. 

As the power piston moves up, the oil on top of the power piston is forced out 

into the passage leading to the upper side of the buffer piston, and to the lower 

side of the compensation land on the pilot valve. The buffer piston moves down, 

partially relieving the compression of the upper buffer spring and increasing the 

compression of the lower buffer spring. The force change of the buffer springs 

tends to resist this movement, resulting in a slightly higher oil pressure on the 

upper side of the buffer piston. This higher pressure is transmitted to the 

underside of the compensation land of the pilot valve plunger. The pressure on 

the lower side of the compensation land produces a force which acts to push the 

pilot valve plunger back to its centered position. 

The force of the pressure differential on the compensation land moves the pilot 

valve towards its centered position. Due to the compensation forces, the pilot 

valve re-centers, although the engine speed is not back to normal. Leakage of oil 

through the needle valve orifice equalizes the pressures above and below the 

compensation land, and allows the engine speed to return to normal. As the 

pressures above and below the compensation land become equal, the buffer 

springs return the buffer piston to the centered position. 

Speed Droop 

The 3161 governor is an isochronous governor with the ability to operate in the 

droop mode by the adjustment of the internal droop pivot pin. The governor may 

be used in the droop mode to allow for load division between two or more prime 

movers connected to a single shaft or for operating in parallel. 

The droop pivot pin is attached to the terminal lever located inside the governor. 

if droop has been set, the following occurs: As the output shaft of the governor 

rotates in the increase direction, the compression of the speeder spring is 

reduced, which in turn reduces the governor speed setting. The speed of the 

prime mover is reduced as load is applied. As the output shaft of the governor 

rotates in the decrease direction, the compression of the speeder spring is 

increased, which raises the speed setting of the governor as load is decreased. 

Limit/Shutdown Pilot Valve 

Shutdown of the prime mover is accomplished with the limit/shutdown pilot valve. 

With the prime mover running on speed, the ballhead pilot valve is in the 

centered position. When the limit/shutdown pilot valve is lowered, pressure oil 

above the control land of the ballhead pilot valve is drained back to the sump 

area. As prime mover speed begins to slow, ballhead flyweights move in, 

lowering the ballhead pilot valve plunger. Oil under the power piston is then 

drained to the sump area. As the power piston moves down, the output shaft is 

rotated in the decrease direction, and the prime mover is shut down.


9907-004   WOODWARD

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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