VAREC 221 SERIES EMERGENCY PRESSURE RELIEF …

1 VAREC 221 SERIES EMERGENCY PRESSURE RELIEF MANWAY COVERSFEATURES Available in EMERGENCY PRESSURE only and EMERGENCY PRESSURE and vacuum RELIEF models. Cast metal cover provides added strength and extended life. Hinged cover provides a fixed pivot point, ensures proper reseating and added safety. cover cannot separate from the base. Easily lifted open to provide a large, unobstructed passage for easy tank access. 221PV incorporates a spring loaded vacuum RELIEF valve integral to the cover assembly. Weather hood and screen provided for protection. Non-metallic seat insert on the pallet minimizes leakage. Durable reinforced fabric diaphragm type PRESSURE side seating surface backed by compressible, cellular non-metallic pads for added cushion and reduced leakage. Optional materials available to suit most chemical APPLICATION221 SERIES manways protect tanks against costly rupture or implosion.

2 The 221P provides EMERGENCY PRESSURE RELIEF only with vacuum RELIEF supplied by a separate breather valve. The 221PV provides both PRESSURE and vacuum 2017 Emerson. All Rights 19/10 TECHNICAL DATAM aterials: Carbon steel, aluminum, stainless steelSizes: 18 , 20 , 24 (450, 500, 600 mm)Connections: Drilled flange to API 650 or ANSI 150# PRESSURE settings: to 6 oz/in2 (22 to 264 kg/m2)Vacuum settings: to 1 oz/in2 (22 to 44 kg/m2)The 221 SERIES is designed to provide EMERGENCY venting of low PRESSURE storage tanks and vessels221P221PV2 PRESSURE SETTING CODES*SizeCover materialBelow min. (counterweighted) - code 0 Min. - code 1 Above min. - code 2 Extra heavy - code 3221P221 PVAlum trim221 PVSS trim221P221 PVAlum trim221 PVSS trim221P221 PVAlum trim221 PVSS trim221P221 PVAlum trim221 PVSS trimoz/in2oz/in2oz/in2oz/in2oz/in2oz/in2 oz/in2oz/in2oz/in2oz/in2oz/in2oz/in218 - - - - - - - - - Carbon steel or 316 Stainless steel - - - - - - - - - - - - - Carbon steel or 316 Stainless - - - - - - - - - - - - - Carbon steel or 316 Stainless - - - - * For higher PRESSURE settings see technical product data sheet for Figure 4210A (VCTDS-00308)

3 Or contact your sales rangesPressure See table belowVacuum oz/in2 to 1 oz/in2 Materials of constructionBase Carbon steel with stainless steel seating surface - standard Aluminum - optional 316 Stainless steel - optionalCover Low copper aluminum cover with carbon steel hinge arm - standard Carbon steel cover with carbon steel hinge arm - optional 316 Stainless steel cover with 304 stainless steel hinge arm - optionalDiaphragmand pads NBR diaphragm with Neoprene pads - standard PTFE diaphragm with Neoprene pads - optional FKM diaphragm with FKM pads - optionalVacuum insert(221PV only) NBR - standard PTFE - optional FKM - optionalVacuum pallet assembly(221PV only) Aluminum - standard 316 Stainless steel - optionalHardware Spring retainer, cotter pin, sleeve, hinge pin, cap screws, nuts and washers - 304 Stainless steelSizes18 , 20 , 24 ConnectionsDrilled to API 650 dimensions, flat face flange - standardDrilled to ANSI 150# dimensions, flat face flange - optionalSpecial flange drilling requirements to DIN, JPI or JIS standards are available upon request.

4 Consult your local sales representative for further 221 SERIES EMERGENCY PRESSURE RELIEF MANWAY COVERSSPECIFICATIONS3139815102543171811A B14121661971139815102543171811AB14121661 971 PARTSItemDescription1 Base assembly2 Cover3 cover ring4 cover pad5 Diaphragm6 Hinge arm assembly7 Hinge pin8 Loading weight9 Weight mtg stud/assembly10 Vacuum hood[1]11 Vacuum pallet[1]12 Vacuum spring[1]13 Vacuum spring retainer[1]14 Vacuum stem[1]15 Vacuum post[1]16 Vacuum screen[1]17 Vacuum seat insert[1]18 Vacuum insert retainer[1]19 Counter weight assembly[2] VAREC 221 SERIES EMERGENCY PRESSURE RELIEF MANWAY COVERSDIMENSIONSNOTES1. Used only for the 221PV vacuum Used only for the 'below minimum' PRESSURE 304 Tip(STL base only)DETAIL AEnlargedDETAIL BEnlargedNo vacuum opening for 221P (see note 1)4 C (B. C.) A B C (B. C.) A BA18 (470)20 (521)24 (622)B25 (635)26 (660)30 (762)C21 (546)23 (597)27 (698)Diameter of holes (16) (19) (19)No.

5 Of holes161620A18 (470)20 (521)24 (622)B25 (635)27 (698)32 (813)C22 (578)25 (635)29 (749)Diameter of holes1 (32)1 (32)1 (35)No. of holes162020 VAREC 221 SERIES EMERGENCY PRESSURE RELIEF MANWAY COVERSDIMENSIONSDRILLED FOR ANSI 150# FLANGE (optional)Size code182024 Nominal pipe size18 (450)20 (500)24 (600)DRILLED FOR API 650 FLANGESize code182024 Nominal pipe size18 (450)20 (500)24 (600)NOTES1. For PRESSURE setting code 0 Installation, mounting arrangement and dimensions are preliminary general information not to be used for construction. Certified drawings are available upon request. Specifications, inches (mm)11 (286) NomCounterweight assembly[1] (Reference)Counterweight assembly[1] (Reference)9 (229) Nom510 20 30 40 50 60 70 80 90 200 300 400 500 600 700 900 2000 3000 4000 6000 8000 10,000100 800 1000 5000 7000 10 20 30 40 50 60 70 80 90 200 300 400 500 600 700 900 2000 3000 4000 6000 8000 10,000100 800 1000 5000 7000 10 20 30 40 50 60 70 80 90 200 300 400 500 600 700 900 2000 3000 4000 6000 8000 10,000100 800 1000 5000 7000 20 30 40 50 60 70 80 90 200 300 400 500 600 700 900 2000 3000 4000 6000 8000 10,000100 800 1000 5000 7000 900020 221P/PV RELIEF manway cover PRESSURE relief18 221P/PV RELIEF manway cover PRESSURE reliefThousands of cubic feet/hour at 60 F and psia, air flow (SCFH)

6 Ounces per square inchThousands of cubic feet/hour at 60 F and psia, air flow (SCFH)Tank PRESSURE Inches of waterOunces per square inchTank pressureInches of waterVAREC 221 SERIES EMERGENCY PRESSURE RELIEF MANWAY COVERSFLOW CAPACITY610 20 30 40 50 60 70 80 90 200 300 400 500 600 700 900 2000 3000 4000 6000 8000 10,000100 800 1000 5000 7000 10 20 30 40 50 60 70 80 90 200 300 400 500 600 700 900 2000 3000 4000 6000 8000 10,000100 800 1000 5000 7000 20 30 40 50 60 70 80 90 200 300 400 500 600 700 900 2000 3000 4000 6000 8000 10,000100 800 1000 5000 7000 20 30 40 50 60 70 80 90 200 300 400 500 600 700 900 2000 3000 4000 6000 8000 10,000100 800 1000 5000 7000 of cubic feet/hour at 60 F and psia, air flow (SCFH)Ounces per square inchTank pressureInches of waterThousands of cubic feet/hour at 60 F and psia, air flow (SCFH)Tank vacuumInches of waterOunces per square inch18 , 20 , and 24 221P/PV RELIEF manway cover vacuum relief24 221P/PV RELIEF manway cover PRESSURE reliefVAREC 221 SERIES EMERGENCY PRESSURE RELIEF MANWAY COVERSFLOW CAPACITY7 SELECTION GUIDEE xample.

7 221201PV1B11 Model221 EMERGENCY PRESSURE and vacuum RELIEF manway coverSize18 18"20 20"24 24"Materials of constructionBaseCoverVacuum trim1PV1 Carbon steelAluminumAluminum1PV2 Carbon steelAluminum316 Stainless steel2PV1 AluminumAluminumAluminum2PV2 AluminumAluminum316 Stainless steel3PV2 Carbon steelCarbon steel316 Stainless steel4PV2316 Stainless steel316 Stainless steel316 Stainless steelDiaphragm/ cover pads/vacuum insertB NBR/Neoprene/NBRT PTFE/Neoprene/PTFEV FKM/FKM/FKMBase flange drilling1 API 6502 ANSI 150# PRESSURE setting0 Below minimum (counterweighted)1 Minimum (standard)2 Above minimum3 Extra heavyExample: 20" EMERGENCY PRESSURE and vacuum RELIEF manway cover with carbon steel base, aluminum cover , aluminum trim, NBR diaphragm and vacuum insert, API 650 drilling, minimum setting. Specify PRESSURE and vacuum settings when 221 SERIES EMERGENCY PRESSURE RELIEF MANWAY COVERSORDERING INFORMATION - PRESSURE AND VACUUM8 Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product.

8 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without GUIDEE xample:221201P0B11 Model221 EMERGENCY PRESSURE RELIEF manway coverSize18 18"20 20"24 24"Materials of constructionCover1P0 Carbon steel/Aluminum2P0 Aluminum/Aluminum3P0 Carbon steel/Carbon steel4P0316 Stainless steel/316 Stainless steelDiaphragm/ cover padsB NBR/NeopreneT PTFE/NeopreneV FKM/FKMBase flange drilling1 API 6502 ANSI 150# PRESSURE setting0 Below minimum (counterweighted)1 Minimum (standard)2 Above minimum3 Extra heavyExample: 20" EMERGENCY PRESSURE RELIEF manway cover , carbon steel base with aluminum cover and NBR diaphragm, API 650 drilling, minimum setting.

9 Specify PRESSURE setting when 221 SERIES EMERGENCY PRESSURE RELIEF MANWAY COVERSORDERING INFORMATION - PRESSURE ONLY