www.ashcroft.com

1 Ten Steps to Select a Diaphragm SealBULLETIN S10 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USATel: 203-378-8281 Fax: 203-385-0408email: specifications are subject to change without notice. All sales subject to standard terms and conditions. Ashcroft Inc. 2015 04/15 DIAPHRAGM TYPEIs the requirement for the diaphragm configuration threaded, welded, bonded or clamped to the top housing. Design types are:Thr eaded Design:ensures a positive sealing surface. The diaphragm can be replaced if or Bonded Design: Metallic Diaphragm- welded to top Diaphragm: bonded to top housing. Both ensure maximum leak integrity .Clamped Design:available with elastomeric diaphragms only . Diaphragm is clamped between top and bottom housing. PROCESS TEMPERATURE LIMITS When selecting the required system assembly fill fluid, lower housing and diaphragm material, ensure minimum and maximum temperature limits are compatible with the selected fill fluid, diaphragm and lower housing materials.

2 When the requirement is for a flanged seal, refer to ASME for pressure and temperature limits. TOP HOUSING, FLANGE OR CLAMP RING MATERIAL, CLAMP BOLTS Consider environmental compatibility when selecting. Flanged Type Seals: Standard flange material is nickel plated carbon steel. Threaded Type Seals:When a clamped ring is of fered, standard material is black painted carbon steel. Clamping Bolts:Standard bolt material is zinc plated carbon steel. See Diaphragm Seal Options page 4 when the standard material is not compatible with environmental conditions. LOWER HOUSING & DIAPHRAGM MATERIAL B oth the diaphragm and lower housing are 'wetted parts' and must be compatible with theprocess media.

3 Refer to our Corrosion Data Guide under Technical Info at material compatibility . Process temperature limits and concentration are a requirementwhen selecting lower housing and diaphragm material. FILL FLUID Consider process temperature and process media compatibility when selecting the system fill fluid. A fill fluid other than glycerin is required for vacuum and compound gauge ranges. Glycerin fill is not available when capillary is required between the instrument and diaphragm CONNECTION SIZED etermine if a 1 4 NPT or 1 2 NPT is requiredSEAL TYPEWhen determining a seal type, two requirements must be considered: 1. Process Connection Type A threaded design sealconnects directly to the process with a female or male NPT connection. A flanged design sealis attached to the process with a flange as specified in ASME B An in-line welded design seal is suitable for flow-thru Type Number PROCESS CONNECTION SIZE & TYPES elect process connection size.

4 If the requirement is for a threaded seal determine if a male or female connection is ALLOWABLE WORKING PRESSUREE nsure the instrument full scale range does not exceed the rated pressure of the diaphragm seal. Flanged seal class ratings are in accordance with ASME If the diaphragm seal will be used with a dif ferential pressure instrument, the instrument static pressure should notexceed the rated pressure of the diaphragm TYPEIf the requirement is for a flanged seal, determine if a raised face, flat face or ring joint flange is requiredHOW TO ORDER: (Refer To Table On Pages 2 & 3 Typical or dering code: 10 102 SS 04T XCGYT 150 RF Fr om pr ocess connection size (code 10 = 1 ) Fr om type number (code 102 = flanged seal with thr eaded diaphragm) Fr om lower housing and diaphragm material (1st S = 316 st.))

5 St. diaphragm, 2nd S = 316 st, st. lower housing Fr om instrument connection size (code 04T = 1 2 NPT ) Diaphragm seal assembly fill fluid & options; pr ecede option code with X (code CG fr om page 3 = glycerin instrumentand seal fill, code YT fr om page 4 above = top housing 316 st. st.) If a flanged seal, select flange rating (code 150 = 150 ANSI class flange) If for a flanged seal, select flange type (code RF = ANSI raised face flange) ASHCROFT OFFERS A WIDESELECTION OFOPTIONS, SEE PAGE :(1) 5000 psi pr essur e rating(2) 9000 psi pr essur e rating(3) Standard with monel diaphragm(4) Fill must be XCF (Halocarbon)150,300,600, 900, 1500 Metal diaphragm (750 )Teflon (-40/400 F) Viton (-40/350 F)Kalrez (30/212 F)GlycerinHalocarbonSilicone Diaphragm Seal OptionsSSCleaning SSPipeClamp/HighClampingForPositiveSSArm oredPlug terialArmoredCa pillar y FlushingHousingHousingHousingRingsClamp3 00 Oxygen or pillar y SSMonelHastelloy C BoltsRingsSeriesStrongto Seal(PMI)SleeveNutsSSOxidizingAgents(4)C ODE1115A1115 PPUYTYMHBSEHPSB6 BDUMQSEALTYPETYPENUMBER100 (1) 101 (1) 200 (1) 201 (1) 300 (1) 301 (1) 104 310 STDSTD(3) 315 STDSTD(3) 311 STD 312 STD 330 400 STDSTD(3) (2) 401 STDSTD(3) (1) 500 STDSTD(3)

6 501 STDSTD(3) 510 STDSTD(3) (1) STD511 STDSTD(3) STD740 STDSTD(3) 741 STDSTD(3) 102 103 202 203 302 303 106 206 402 STDSTD(3) 403 STDSTD(3) 702 STDSTD(3) 703 STDSTD(3) 105 107 108 205 207 208 QUICK THREADEDFLANGEDIN-LINE4 Ash Bul S-10 4/1/15 10:36 AM Page 1100 101200 201300 301104 310315 311312 330400 401500 501510 511740 741102 103202 203302 303106 206402 403702 703104 105107 108204 205207 208320 THREADEDFLANGEDIN-LINEQUICKCONNECTF/M F/M F/M F/M (5)

7 F/M F/M F/M F/M (5) F/M F/M F/M F/M (5) F/M F/M F/M F/M (5) F/M F/M F/M F/M (4) (4) (4) (4) (4) (4) (4) (4) (4)

8 F/M F/M F/M F/M (6) (4) (4) (4) (4) (4) (4) (4) (4) (4) F F (5) F/M F/M M M (1) F F (1)

9 F/M F/M F/M F/M F F ALL M F/M F/M F/M F/M

10 (1) (2) F/M F/M F/M F/M (1) (2) F/M F/M F/M F/M (1) (2) F/M F/M F/M F/M