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MechanicalPressure MeasurementBourdon Tube Pressure GaugeStainless Steel CaseType 212.53 - Dry CaseType 213.53 - Liquid-filled CaseWIKA Datasheet 21X.53Applications Intended for adverse service conditions where pulsatingor vibration exists (with liquid filling) Hydraulics & compressors Suitable for gaseous or liquid media that will not obstructthe pressure systemProduct Features Vibration and shock resistant (with liquid filling)Stainless steel casePressure ranges up to 15,000 psi (1000 bar)FlexWindowTM option with integrated pressurecompensation and 100% case fill*Bourdon Tube Pressure Gauge Model 21X.53SpecificationsDesignASME B40.100 & EN 837-1Sizes2”, 2½” & 4” (50, 63 & 100 mm)Accuracy class2” & 2½”: 2/1/2% of span (ASME B40.100 Grade A)4”: 1% of span (ASME B40.100 Grade 1A)RangesVacuum / Compound to 200 psi (16 bar)Pressure from 15 psi (1 bar) to 15,000 psi (1000 bar)Pressure from 15 psi (1 bar) to 10,000 psi (690 bar) - 2” sizeor other equivalent units of pressure or vacuumWorking pressure2 & 2½”:Steady:¾ full-scale valueFluctuating: 2/3 full-scale valueShort time: full-scale value4”:Steady:full-scale valueFluctuating: 0.9 x full-scale valueShort time: 1.3 x full-scale valueWIKA Datasheet 21X.53 · 03/2021(*) EN837-1 does not apply to FlexWindow .Operating temperatureAmbient: -4 F to 140 F (-20 C to 60 C) - dry-4 F to 140 F (-20 C to 60 C) - glycerine filled-40 F to 140 F (-40 C to 60 C) - silicone filledMedium: 140 F ( 60 C) maximumTemperature errorAdditional error when temperature changes from referencetemperature of 68 F (20 C) 0.4% of span for every 18 F(10 K) rising or falling.Ingress protectionIP65 per EN 60529 / IEC 60259IP66 (NEMA 4) with FlexWindowTM option (2-1/2” only)Pressure connectionMaterial: copper alloyLower mount (LM) or center back mount (CBM) - 2” & 2½”Lower mount (LM) or lower back mount (LBM) - 4”⅛” NPT, ¼” NPT or ½” NPT limited to wrench flat area ABS (2”& 2½”) and white aluminum (4”)Page 1 of 8R

Bourdon tube2” (50 mm) 870 psi (60 bar): C-shape copper alloy2” (50 mm) 870 psi (60 bar): Helical copper alloy2½” (63 mm) 870 psi (60 bar): C-shape copper alloy2½” (63 mm) 870 psi (60 bar): Helical copper alloy2½” (63 mm) 6000 psi (400 bar): Helical stainless steel4” (100 mm) 1000 psi (70 bar): C-shape copper alloy4” (100 mm) 1000 psi (70 bar): Helical stainless steelMovementCopper alloyDialWhite ABS (2” & 2½”) and white aluminum (4”)PointerBlack aluminumCase304 stainless steel with vent plug for ranges 300 psi(FlexWindowTM option without vent plug) and stainless steelcrimp ring.Case connection sealed with O-ring, (O-ring materialdependent on the case fill): 2½”: EPDM O-ring for Glycerine case fill; Viton O-ring forSilicone fill 4”: EPDM O-ring for Glycerine or Silicone case fill; VitonO-ring for Halocarbon or Fluorolube fillPage 2 of 8WindowPolycarbonate with Buna-N gasket (standard)Laminated Safety Glass with Buna-N gasketFlexWindowTM (Clear liquid silicone rubber) with integratedgasketCase fillType 213.53 - GlycerinGlycerin/Water100% Case fill with integrated pressure compensation withFlexWindowTM option (only available in 2-1/2” and only withGlycerin and Glycerin/Water case fill)Optional extras Brass restrictor Stainless steel front or rear flange - 2½” & 4” Zinc-plated steel or SS U-clamp bracket (field installable) External zero adjustment (2½” only, not available withFlexWindowTM) Red drag pointer or mark pointer option:(2-1/2” &4” only, not available with FlexWindowTM) Silicone or Halocarbon oil case filling (not available withFlexWindowTM) Special connections limited to wrench flat area Custom dial layout Other pressure scales availablebar, kPa, MPa, kg/cm² and dual scalesWIKA Datasheet 21X.53 · 03/2021

DimensionsSizeA2”mm55in2.172½” mm 69in2.694”mm 379.53.13HJ3.60.143.60.14304.81.18 .36752.951164.57O172.80853.351325.20STW5.5140.22 ¼” 0.556.5 140.26 ¼” 0.558220.31 ½” 0.87Weight0.27 lb.0.33 lb.0.36 lb.0.44 lb.1.10 lb.1.76 lb.dryfilleddryfilleddryfilledNote: For ¼” NPT connections on 4” gauges, reduce B dimension by 5mm/0.2”Recommended panel cut-out:2”- U-clamp: 51mm2½”- U-clamp: 63mm4”- U-clamp: 101mm4½”- panel mount adapter 104mm minimumfront flange: n/afront flange: 65mmfront flange: 104mm(not shown)WIKA Datasheet 21X.53 · 03/2021Page 3 of 8

Quick Order Guide/Standard Items - 21X.53 2”Page 4 of 8WIKA Datasheet 21X.53 · 03/2021

Quick Order Guide/Standard Items - 21X.53 21/2”WIKA Datasheet 21X.53 · 03/2021Page 5 of 8

Standard Order Code - 21X.53 2” & 21/2”Modelcode:2112. 53 -3-4567-8-9 10 11 12-13 14 15ZAdditional Text:Additional scale ranges and options are available. Please contact the factory or access the product configurator for model 21X.53 on the WIKA US website.Page 6 of 8WIKA Datasheet 21X.53 · 03/2021

Quick Order Guide/Standard Items - 21X.53 4”WIKA Datasheet 21X.53 · 03/2021Page 7 of 8

Standard Order Code - 21X.53 4”Modelcode:2112. 53 - E -3456-7-8 9 10 11-12 13 14ZAdditional Text:Additional scale ranges and options are available. Please contact the factory or access the product configurator for model 21X.53 on the WIKA US website.Page 8 of 8WIKA Datasheet 21X.53 · 09/2020