Description Saf-T-Gard Hydraulic Actuator MH 60 Series for use with ", 4, 5 and 6" nomal gate valves The The Cameron MH Hydraulic Actuator product le has been developed by usg the superior features of field proven products and then combg them with novative technology. Particular attention has been given to safety, ease of matenance and cost of manufacturg. The Cameron MH Hydraulic actuator series is designed to be used with all manufacture gate valves nomal sizes of " to 6". Its simple design and operatg prciple make this hydraulic actuator suitable for all types of applications. The Cameron Hydraulic actuators are terchangable with standard bonnet adapters. The MH60 is a dual piston which combes the greatest force value with mimal supply pressure while requirg a very small swept volume. Design Advantages Superior Piston Design Cameron hydraulic actuators utilize a special actuator head with a dual piston design. This design combes the greatest force value with mimal supply pressure while requirg very small volume of fluid. Corrosion Resistant Materials All Cameron hydraulic actuators are manufactured to NACE MR -01-75, addition all non-staless components are coated with Xylan to maximize corrosion resistance. Flexible Actuator Orientation Connectg misaligned components with rigid tubg can be time consumg and can duce high stress to the tubg connections. The MH lower rg is threaded to the bonnet, thus allowg rotation of the actuator to accommodate precise alignment. Wear Beargs Elimate Gallg Thick wear beargs are used to elimate gallg between movg metal components. Beargs are used between the packg retaer/stem terface and the actuator head/ piston terface. Simple Actuator Mountg Arrangement The actuator is mounted by merely rotatg it onto the bonnet. It is locked place with set screws. Product Data Sheet #SW96-405.pm6 Rev. 2 Page 1
Visiual Indicator Easily Viewed Two visual position dicator wdows located 180 apart on the housg wall allow viewg of the full gate travel without extendg the length of the actuator. The wdows are recessed so they will not terfere with normal handlg and matenance. If required, an external position dicator the form of a top shaft can be added to allow visual spection of valve position from a greater distance. The top shaft is designed to elimate the transfer of torque to the gate and bonnet stem when usg a manual hold open device. Actuator Housg Not Pressurized The actuator housg is not a pressure vessel, but is a structural coverg only. All structural components meet NACE requirements. This is a safety advantage to workers on platforms. Dra Plugs Allow Fushg of Housg Two large dra plugs are located at either end of the housg to facilitate cleang of the actuator. Large Portg Eases Matenance Pressure let and relief flow passages are 1/2" N.P.T. These larger ports are durable and help elimate debris buildup. Permanent Drift Settg Staless steel spacers are used to provide permanent drift adjustment. Removal of the actuator does not affect the adjustment. Easy Field Conversion Manual valves may be converted to actuated valves the field, usually without removg the valve from the flowle. Rapid Closure The exhaust port is designed with a standard 1/2" N.P.T. thread, which mimizes closure time and debris buildup. MH-60 Dual Piston Operation Product Data Sheet #SW96-405.pm6 Rev. 2 Page 2
Technical Specifications MH60 (600, 6004, 6005 & 6006) Model MH 60 M aximum Operatg Pressur e 5800 PSI (400 Bars) Series 6000 Relief Device Settg 5800 PSI (400 10 F (54 C) Bars) at S izg For 1-1/16" 6-/8" T est Pressur e 8750 psi (60 Bars) API Classification 6A 600 = 175 lbs (78 kg) Trim for Standard Components Trim for Retaed Fluid Components A A Weight 6004 = 275 lbs (125 kg) F F 6005 = 275 lbs (125 kg) PSL* Retaed Fluid 1, 2, 6006 = 275 lbs (125 kg) PR-1 and PR-2 A ppendix F 2. 5 Operatg Temperature** (P/U) -20 F to +250 F (-29 C to +121 C) Service Class PR1, PR2 Non-Risg Stem Configuration Risg Stem Configuratio n Model Sprg Preloa d Swept Volum e Closg Time Swept Volum e Closg Time 65 2200 91 seconds 87 seconds 654 000 86 80 655 4000 97 90 656 4400 106 100 6542 2000 66 seconds 64 seconds 654 2200 94 90 6544 000 106 100 6545 4000 12 115 6546 4400 17 10 *API requires that only retaed fluid actuators must have a PSL ratg. ** For special temperature applications, contact engeerg. Product Data Sheet #SW96-405.pm6 Rev. 2 Page
Periodic Matenance Schedule The followg matenance schedule is recommended for normal operations. MAINTENANCE INTERVAL MAINTENANCE INTERVAL Replace all seals actuator assembly. At least every 12 months. Close and open SSV twice. Operation should be smooth and consistent both directions. Every month. Inspect ner and and top shaft. outer piston, actuator head, cap Inspect pressure relief device and pressure let fittgs for leaks. Clean top shaft and remove debris. When bonnet seals are replaced. Every month. Visually spect for external damage such as dents, scratches, etc. If scratched or chipped, touch up with pat to prevent rust. If dented, disassemble and spect actuator to ensure the damage does not affect the actuator s performance. Every 6 months. In order to mata the traceability requirements, all certified replacement parts must be documented and referenced writg to each dividual actuator by its serial number. Trouble Shootg Chart The followg is a table of operations and matenance problems which may be encountered with the actuator stalled. Problem Control pressure not build. actuator will Actuator will not stroke on a valve whether or not valve is pressurized. Gate valve does not stroke open when control pressure is applied. Actuator will not attach to bonnet assembly. Actuator will not stroke to full closed or Fail-Safe closed position. Actuator will not drift after assembly to bonnet/valve. Probable Cause Corrective Action D amaged control le. Inspect control le for damage and/or leakg. I nsufficient Pressure control le. Install gauge at pressure source to verify desired pressure available. F aulty pressure gauge. Verify pressure gauge is correctly calibrated. Leakg around of actuator. bolted flange and/or bottom Insufficient pressure control le. ReplaceReplace and/or spect piston seals accordance with assembly structions. If leakage persists, replace head assembly accordance with same structions. Verify pressure availability from source. Consult control pressur e formation from the formation chart per size valve application. B onnet to stem bdg. Consult appropriate matenance and operatg structions for bonnet. Valve and/or seats improperly stalled. Debris valve and actuator vents. D ebris shaft or sprg housg. Re-spect housg and sprg. Bonnet stem is not fully extended and back seated. Bad or wrong thread on bonnet stem and downstop on bonnet/sprg assembly. Gate and seats are improperly stalled causg excessive friction. Incorrect number of spacers stalled. Wrong spacer per valve size. Improper gate to stem engagement. Remove actuator. Remove bonnet per appropriate matenance and operatg manual per bonnet manufacturer. Repair and/or replace valve components accordance with valve manufacturer s structions. Remove actuator per struction manual. Remove bonnet per structions per bonnet manufacturer matenance and operatg manual. Clean debris from valve body. Grasp stem bonnet and pull to full extension, properly back-seatg stem. Check threads on bonnet stem and downstop for burrs, nicks, dgs, and debris. Check size and thread pattern for proper engagement. Remove actuator per structions manual. Manually push and/or pull bonnet stem to determe severity of bdg. If severe, clean and spect gate and seats for wear abrasion. Replace if necessary. Remove actuator per structions the manual. Check number of spacers. Repeat actuator material. removal and check for proper spacer per bill of Remove actuator per structions manual. Remove bonnet per bonne t manufacturer s structions. Check engagement per valve manufacturers structions and/or drawgs. Reassemble. Product Data Sheet #SW96-405.pm6 Rev. 2 Page 4
Product Data Sheet #SW96-405.pm6 Rev. 2 Page 5