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Type-L-Series-Diaphragm-Seal-Elements - 2 Pages

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Catalogue excerpts

Diaphragm Seals Type L Series Diaphragm Seal Elements for Low Pressure Applications DESCRIPTION Type L Series diaphragm seals feature removable, elastomer diaphragms that may be replaced or repaired if required. These seal elements are intended for low pressure sensitivity instruments such as bellows and diaphragmtype gauges. They are sensitive to pressure changes as low as 2” H2O (51mm H2O at 4°C). Type L Series diaphragm seals employ diaphragms retained between two bolted members. In the Type clean-out design, the diaphragms are situated between the top and middle ring. In the LB and LG design, the diaphragms are located between the top and bottom. The diaphragm is loosely retained in the upper housing for easy repair or replacement. This extends the life of the seal element and allows for field replacement and service. • Removable elastomer diaphragms - Ideal for low pressure sensitivity bellows and diaphragm- type g­ uges a • Materials available for corrosive applications • Superior low pressure response - Pressures as low as 2” H2O - Vacuum to 29” Hg (LA and LH models) • Large volumetric displacement - 1.38 cubic inches • Seal ratings to 5000 psig (345 bar) ­ SEAL C­ NFIGURATIONS O Threaded Seal Elements There are four basic versions of L Series diaphragm seals with threaded attachments. The LB seal element is used for pressure applications only and has a pressure rating of 1250 psig at 100°F (86 bar at 38°C). The LG seal element is similar to the LB seal, except that it has a 1/4 NPT flushing connection. The LA seal element has a standard pressure rating of 1250 psig at 100°F (86 bar at 38°C), but may also be supplied with a pressure rating of up to 5000 psig. The LH seal element is similar to the LA seal element except that it features a 1/4 NPT flushing connection. Both have an extended area allowing for negative displacement making them ideal for vacuum applications. Flanged Seal Elements There are two basic versions of flanged L Series seal elements. The flange is a standard raised face style. The LC seal element may be supplied in 1/2” and 3/4” with Class 150 thru 1500 ANSI flange ratings. A 1“ version may be supplied with a Class 150 thru 600 ANSI rating. 2” thru 8” versions are available with Class 150 to 300 ANSI ratings. In-line Flow Thru Seal Elements In-line flow thru L Series diaphragm seals include the LJ versions for 3-inch and larger pipe connections. The LK versions are available with 1/4, 3/8, or 1/2 NPT process connections. The LM version is for pipe sizes from 3/4” to 2.5” schedule 40 pipe (other schedules available) where the diaphragm seal element is to be directly welded to the process pipe. The LN version is for pipe sizes from 3/4” to 2.0” requiring ANSI ratings of 150 or 300. These may be supplied with an optional TEFLON® liner. The LP versions are for pipe sizes from 3” to 8” and with ANSI ratings of 150 or 300. ALL ORDERS CAN BE SENT TO: On-line fax: 215-323-9450 or e-mail to usg.sales@ametek.com © 2008, by AMETEK, Inc. All rights reserved. Printed in the U.S.A. 908PDF (160166) Sales/Technical Support: 215-257-6531 900 Clymer Avenue Sellersville, PA 18960 U.S.A. Customer Service: 727-536-7831 8600 Somerset Drive Largo, FL 33773 U.S.A. Specifications are subject to change without notice. Visit our

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Diaphragm Seals Type L Series Diaphragm Seal Elements for Low Pressure Applications MODEL L SERIES SELECTION GUIDE SEAL TYPE SEAL MOUNTING OPERATING TEMPERATURE OPERATING PRESSURE PROCESS APPLICATION FLUSHING CONNECTION With Flushing Connection With Flushing Connection Flange Dependent With Flushing Connection In-Line Flow ThruA In-Line Flow ThruB In-Line Flow ThruC In-Line Flow ThruD Flange & Schedule Dependent In-Line Flow ThruE Flange & Schedule Dependent NOTE: 1 5000 psig available at 100°F (345 bar at 38°C) 2 LB and LC Series with non-metal exposed materials are rated at 100 psi (7 bar) In-line...

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