Product ID: 10189553 – Actuator Assembly, Pneumatic Valve, Normally Open

Description:
This component is a pneumatic actuator assembly, configured as a normally open (NO) valve actuator, designed for high-pressure waterjet cutting systems . It is a precision-engineered air-driven control component that converts compressed air pressure into controlled linear mechanical motion to operate the pneumatic on/off valve (water switch) assembly . As a normally open actuator, the valve remains open when no pneumatic pressure is applied, allowing high-pressure water to flow to the cutting head. When compressed air is supplied (typically at 75-125 PSIG), the actuator closes the valve, stopping the waterjet .

This actuator assembly is a complete, pre-assembled unit that includes the top closure, actuator cylinder, piston, and internal seals . It is specifically designed for use on KMT AccuStream SL-V series (30-50 HP), SL-VI series (75-100 HP), and other compatible intensifier pump systems operating at 60,000 PSI (approximately 4,137 bar) .

Assembly Components:
The complete actuator assembly includes the following components :

• Top Closure, NO Valve Actuator (VLBV601184)

• Actuator Cylinder, NO Valve, New Style (VLBV401184NS)

• Piston, NO Valve Actuator (VLBV501184)

• O-Ring, 2-7/16" x 2-5/8" (VL10074714)

• O-Ring, 2-1/4" x 2-3/8" x 1/16" (2 pcs) (VL10074631)

• Bearing Disk, 1/4" Seal (VL10187250)

Applications:

• Used as the pneumatic actuation component on the on/off valve (water switch) assembly of waterjet cutting heads

• Mounted on top of the pneumatic valve body (Product ID 10189181) to control high-pressure water flow to the cutting head

• Converts compressed air into mechanical motion to open or close the valve, enabling precise starting and stopping of the cutting jet

• Suitable for ultra-high pressure waterjet systems operating at 60,000 PSI (approximately 4,137 bar)

• Compatible with KMT AccuStream SL-V series (30-50 HP), SL-VI series (75-100 HP), and other standard waterjet intensifier systems

Features:

• Normally Open Configuration: Default state is open; pneumatic pressure (75-125 PSIG) is required to close the valve

• Complete Pre-Assembled Unit: Includes all internal components (cylinder, piston, top closure, O-rings, bearing disk) for drop-in replacement

• High-Strength Construction: Manufactured from corrosion-resistant aluminum alloy and stainless steel for durability in harsh waterjet environments

• CNC-Machined Housing: Precision-machined for airtight performance and perfect alignment with valve seats

• High-Quality Seals: Internal seals made from Viton or NBR elastomers for leak-free pneumatic operation

• Standard Air Intake: Features 1/8-27 NPT right-hand thread for standard compressed air connection

• Suggested Operating Pressure: 75-125 PSIG (approximately 5.2-8.6 bar)

• Weight: Approximately 0.99 kg (2.18 lbs)

• Cross-Reference Part Numbers: Replaces OEM numbers 1-13243, RSAC13243, and others . Also referenced as KMT# 10189553

Maintenance:

• Critical Safety Component: The actuator is part of the safety system controlling high-pressure water flow. Proper maintenance is essential to ensure reliable valve operation

• Full Depressurization: Before servicing the actuator, fully depressurize both the hydraulic system and the high-pressure water system. Also shut off and vent the compressed air supply. Follow lockout/tagout procedures

• Inspection: Periodically inspect the actuator body for signs of wear, damage, corrosion, or air leakage. Check all external connections for security

• Air Supply Quality: Ensure clean, dry, lubricated compressed air is supplied (75-125 PSIG). Contaminated air can cause internal corrosion or seal degradation

• Functional Testing: Verify correct operation by observing whether the valve opens and closes properly in response to pneumatic control signals

• Seal Replacement: When servicing the actuator, replace all internal O-rings and seals (including the bearing disk VL10187250) as a set. Do not reuse old seals

• Replacement Criteria: Replace the actuator assembly if the piston fails to actuate despite correct air supply, if external air leakage is present, if the piston is seized, or if visible damage to the housing is detected

• Torque Compliance: When reinstalling the actuator on the valve body, tighten all mounting hardware to the specific torque values listed in the equipment service manual

• Storage: Store spare actuators in a clean, dry environment in protective packaging to prevent damage to seals and internal components before use