Emerson ACE97- User Manual

Page 2 - Specifications; General Type ACE97 Specifications; External

Type ACE97 2 Pad (Tank Blanketing) Specifications Pad Body Sizes and End Connection Styles 1/2, 1, and 2 NPT NPS 1/2, 1, and 2 / DN 15, 25, and 50 CL150 RF Maximum Operating Inlet Pressure (1) 200 psig / 13,8 bar Maximum Main Valve Inlet Pressure (1) 200 psig / 13,8 bar Inlet Operating Ranges (1) NP...

Page 3 - Introduction; Scope of the Manual; This instruction manual provides installation, startup,

Type ACE97 3 If a leak develops or if the unit or outlet continually vents gas, service to the unit may be required. Failure to correct trouble could result in a hazardous condition. Only a qualified person must install or service the unit.Installation, operation, and maintenance procedures performe...

Page 4 - Product Description; tank. Blanketing pressure is kept to a minimum in order; Pad; Principle of Operation; Vent

Type ACE97 4 Product Description The Type ACE97 Pad-Depad valve is a self-contained, pilot-operated valve that maintains a blanket of inert gas on top of a stored product to protect it from atmospheric contamination. It reduces combustibility, decreases vaporization, controls vapor space pressure du...

Page 6 - Installation and Startup; WARNING

Type ACE97 6 Installation and Startup ! WARNING Personal injury, equipment damage, or leakage due to escaping accumulated gas or bursting of pressure-containing parts may result if this gas blanketing system is overpressured or installed where service conditions could exceed the limits given in the ...

Page 7 - Piping Considerations; Inlet Piping; Outlet Piping; CAUTION; Sensing Line; pressure under process conditions.; Diagnostic Gauges; an inlet pressure gauge, it is advisable to install a

Type ACE97 7 must agree with the system that you are Padding (blanketing) or Depadding (recovering). The serial number will be needed in any communication with your local Sales Office. 3. Clean the gas padding (blanketing) supply lines of all dirt and foreign material before connecting them to the T...

Page 8 - and emergency) must be in place; Startup; Always open the tank shutoff valve prior; installed and visible.; Adjustment

Type ACE97 8 Startup, Adjustment, and Shutdown CAUTION If required, tank vents (normal and emergency) must be in place and operating. Startup CAUTION Always open the tank shutoff valve prior to the inlet shutoff valve. Failure to do so could result in inlet pressure being applied to the actuator cas...

Page 9 - Shutdown; Maintenance; Corning; Monthly Maintenance

Type ACE97 9 Table 2. Diagnostic Analysis Pressure Ranges DIAGNOSTIC STATUS Equal to inlet supply pressure Pilot and main valves are closed. Tank pressure is at or above set pressure. Slightly below inlet supply pressure Pilot valve supplies gas to tank. Tank pressure is just below set pressure. Wel...

Page 11 - Annual Maintenance; Pad Valve Diagnostics; Note

Type ACE97 11 Table 9. Diagnostics Table: C v 20 through 60, Inlet Pressure Range Spring 25 to 50 psig / 1,7 to 3,4 bar ACTUAL INLET SUPPLY PRESSURE TO VALVE DIAGNOSTIC PORT PRESSURE Pressure when Pilot Starts to Open Pressure when Main Valve Starts to Open Pressure when Main Valve is Fully Open psi...

Page 12 - Disassembly and Assembly; Disassembly; Depad Pilot Valve Removal

Type ACE97 12 are shown in Table 2. In order to evaluate a valve, examine the valve nameplate to determine the C v and inlet pressure range (main valve spring). There are four pressures involved in evaluating a valve: actual inlet pressure, pressure to start opening pilot valve, pressure to start op...

Page 13 - internal components.; Actuator Disassembly; more springs and associated hardware, depending; Pad Valve Disassembly; steps are required. Proceed to Pad Valve Cage

Type ACE97 13 2. Unthread the lower cage (key 110). 3. Remove the rain cap (key 109). 4. Unthread the upper cage (key 106). 5. Remove the return spring (key 101). 6. Place a pin through the follower (key 103) and unthread the nut (key 31). This will release the internal components. 7. Remove all int...

Page 14 - Depad Main Valve Disassembly

Type ACE97 14 5. Remove the plug (key 22) from the main valve. 6. Insert wooden dowel rod (or similar blunt tool) through the bottom of the bonnet bore to remove the cage sub-assembly (keys 35 and 40). Pad Valve Cage Disassembly (NPS 1/2 / DN 15 valve) Refer to Figures 8 and 13. 1. Remove the cage (...

Page 15 - Assembly; moving contact.; Depad Pilot Valve Assembly; Pad Pilot Valve/Cage Assembly (NPS 1 and 2; Do not place the rolling diaphragm

Type ACE97 15 Assembly Before proceeding, read the following instructions. Refer to the figures that pertain to your valve (Figures 11 through 20) and review the list of approved lubricants, sealants, and adhesives (in the Maintenance section) when performing assembly operations. 1. Clean and inspec...

Page 16 - Loctite

Type ACE97 16 3. Thread the poppet (key 42) onto the piston (key 37). Use soft-jawed pliers to restrain the piston so it is not damaged. Do not hold the poppet by the stem. Insert a small drill bit into the cross-drilled hole on the poppet stem (key 42) to turn and tighten. 4. Slide the O-ring (key ...

Page 17 - Parts Ordering

Type ACE97 17 Actuator Assembly Refer to Figure 20. 1. Place the actuator gasket (key 27) and lower actuator case (key 113) onto the body (key 18). Secure with lock washers and hex-head screws (keys 28 and 29). Tighten all hex-head screws uniformly. 2. Place the actuator gasket (key 27) onto the pad...

Page 18 - Parts List

Type ACE97 18 Parts List Key Description Part Number Parts Kits NPS 1/2 / DN 15 pad valve (includes keys 16, 27, 38, 39, and 41) Nitrile (NBR) 19B6041X012 Fluorocarbon (FKM) 19B6041X022 Perfluoroelastomer (FFKM) 19B6041X032 Ethylenepropylene (EPDM - FDA) 19B6041X042 NPS 1 / DN 25 pad valve, C v 1 th...

Table of Contents:

Summary

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