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SECTION I
I. DESCRIPTION AND SCOPE
The Model 1049 Secure-Gard is a pilot operated vent
valve intended for installation on atmospheric and low
pressure storage tanks, vapor recovery systems, and
process systems.
II. PRIOR TO INSTALLATION
Remove all packing material inside and outside of the valve prior to installation.
SAFETY WARNING: In addition to your company's safety procedures, this section includes guidelines that should
be followed during the installation, operation, and maintenance of Valve Concepts, Inc's Pilot Operated Vent Valve.
It is necessary to completely read and understand these guidelines.
Tank or system over pressure protection is the primary function of pilot operated vent valves. It must be selected to
meet the total pressure flow requirements within the Maximum Allowable Working Pressure of the system on which
it is installed. Consult API Standard 2000 for tank protection sizing procedures. Improperly specified vent valves
may result in structural damage to the tank or system, and may cause severe personal injury or death.
Valves are pre-set at the factory per customer purchase specifications. DO NOT change the set pressure without
consulting the factory or your local VCI representative. Improper adjustment may cause the valve to malfunction.
DO NOT attempt to remove the valve from the tank or process vessel without first bleeding all pressure from the
system. ALTERNATIVE MEANS OF PRESSURE VENTING MUST BE PROVIDED WHEN THE VALVE IS OUT
OF SERVICE.
The valve has been exposed to process while in service. Observe all plant procedures and Material Safety Data
Sheets (MSDS) for the products in the system while inspecting, adjusting, or servicing the valve. Take appropriate
safety precautions regarding eye protection, respiration and skin contact.
III. INSTALLATION
The inlet and outlet flanges are normally standard ANSI 150 lbs. class flanges unless otherwise indicated and
should be connected following accepted piping practices.
INSTALLATION, OPERATION AND MAINTENANCE MANUAL (IOM)
Model 1049
Secure-Gard Pilot Operated Vent Valve
The Model 1049 is a low pressure pilot operated valve.
In as such, does not supply vacuum relief. If vacuum
relief is required, it should be provided by a separate
device.
Follow your company's safety procedures to avoid
injury to personnel or damage to equipment.
SECTION II
SECTION III
IOM - 1049
WARNING
CAUTION
01-17
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Related Manuals for Valve Concepts 1049 Secure-Gard
Summary of Contents for Valve Concepts 1049 Secure-Gard
- Page 1 SAFETY WARNING: In addition to your company’s safety procedures, this section includes guidelines that should be followed during the installation, operation, and maintenance of Valve Concepts, Inc’s Pilot Operated Vent Valve. It is necessary to completely read and understand these guidelines.
- Page 2 5 psig, but not to exceed the maximum pressure rating must be higher than the set pressure of the vent valve, of the filter regulator. (The standard filter regulator sup- plied by Valve Concepts is rated at 300 psig.) INSTALLATION DIAGRAMS FOR STANDARD ACCESSORIES & CONFIGURATIONS Option 2 Standard Confi...
- Page 3 INSTALLATION DIAGRAMS FOR STANDARD ACCESSORIES & CONFIGURATIONS Option 4 Option 7 With Back Flow Preventer to Prevent Back Flow With Rotameter to Purge Pilot Sense through Main Valve and Pilot and Discharge Lines Option 8 Option 5 With Field Test Connection, Back Flow Preventer and With Field Test Connection Rotameter to Purge Pilot Sense and Discharge Lines (Back Flow Preventer Included)
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Page 4: Maintenance
SECTION IV IV. START-UP For the valve to be in the closed position, tank pressure Operation of the Model 1049 is automatic once the set must reach the actuator though the pilot. pressure has been set. (The set pressure is bench-set per the customer’s specifi... - Page 5 spring guide washers (111), and lockwashers (110) on Thread the blowdown needle (117) completely in, then the stem. While holding the wrenching washers (128) back out 3 full turns, and lock the jam nut (114). with a wrench, (and making sure the bolt holes of the diaphragm and diaphragm case align) thread the nuts To replace soft goods of the main valve actuator: (109) and tighten.
-
Page 6: O-Ring Material
TABLE 1 Soft Goods Kit Part Numbers Soft goods kits, consisting of all the non-metallic components (o-rings, sense diaphragm, gaskets, etc) are available. The drawings indicate which components are included in the kit. For other replacement parts, specify by item number and description plus material, if the part number is not known. -
Page 7: Troubleshooting Guide
SECTION VI VII. TROUBLE SHOOTING GUIDE 1. Model 1049 opens below set point. Possible Cause Remedy Sense line is clogged. Check sense line and sense port for blockage. Clean as needed Incorrect set pressure. Adjust set pressure screw to proper set pressure. Pilot or actuator diaphragm failure. - Page 8 Model 1049 Pilot Assembly ITEM NO. QUANTITY PART NAME Pilot Body Upper Diaphragm Case Lower Diaphragm Case Spring Bonnet Support Plate 107‡ Diaphragm Spindle Assembly Lockwasher Lower Spring Guide Washer Spring Button Adjusting Screw Jam Nut Set Pressure Spring Bug Screen Vent Blowdown Needle 118‡...
- Page 9 For 10” x 12” Size Only Bolts Lockwashers For 12” x 16” Size Only Bolts Lockwashers ‡Parts are included in the Soft Goods Kit Valve Concepts, Inc. 3644 Westchase Drive Houston, TX 77042-5224 PH (713) 271-7171 Fax. # (713) 271-0153 www.valveconcepts.com email: vcisales@cashco.com...
- Page 10 ATEX 94/9/EC: Explosive Atmospheres and Cashco Inc. Regulators NOTICE Only for Product Codes wherein hazard category ATEX has been selected. These valves satisfy the safety conditions according to EN 13463-1 and EN 13463-5 for equipment group IIG 2 c. Caution: Because the actual maximum temperature depends not on the equipment itself, but upon the fluid temperature, a single temperature class or temperature cannot be marked by the manufacturer.
- Page 11 indicating the gauge is compliant with the ATEX Directive (See items 26, 27, and 28 in Appendix A). Until compliance is determined, regulators should not be ordered with pressure gauges for use in potentially explosive environments. Tied diaphragm regulators with outlet ranges greater than 100 psig should be preset to minimize the risk that improper operation might lead to an outboard leak and a potentially explosive atmosphere (See item 6 in Table 1).