Serie 1890 - Farris Engineering - (Version JPG) - PDF Catalogue | Technical Documentation

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Relief valve, Valve, Safety valve

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Catalog 295C

Series 1890 (%

Pressure Relief Valves for Air, \/ * Steam, Vapor & Liquid Service


Bill of Materials
Item No.	Part Name		Material 1 890 &1 892
1	Body		SA-479 Type 316 St. St.
2	Bonnet		SA-216 Gr. WCB Carbon Steel
3	Disc		316 St. St.
4	Guide		Stainless Steel
5	Cap, Plain Screwed		Carbon Steel
6	Stem		Stainless Steel
7	Spring Adj. Screw		Stainless Steel
8	Spring Button		Stainless Steel
9	Jam Nut		Stainless Steel
10	Stem Shoulder		Stainless Steel
11	Body Gasket		316 St. St.
12	Cap Gasket		316 St. St.
13	Lift Stop Ring		Stainless Steel
14	Retaining Ring-Stem Shoulder		Stainless Steel
15	Wire Seal		Lead
16	Nameplate (not shown)		Stainless Steel
17	Spring	-20F° to +400°F	316 St. St.
17	Spring	+401°Fto +750°F	Chrome Alloy Rust Proofed

• Built in conformance to ASME Code Section VIII for Air, Steam, and Liquid Service.

• Set pressures to 800 psig.

• Stainless steel body and trim.

• Carbon steel bonnet and cap.

• Flat seats for easy maintenance.

■

ED □

Built in conformance to ASME Code Section VIII, Capacity Certified by National Board

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Type Number

Service

Valve Size

Maximum Set Pressure, psig¹

Maximum Set Pressure, barg¹

Maximum Back Pressures

Materials

Inlet x Outlet

-20°F to +400°F

+401°Fto +750°F

-28.9°C to +204°C

+205°C to +399°C

psig @

100°F

barg @

37.8°C

Body / Bonnet

Spring

18902-M20

Air, Steam & Vapor

1/2 x 1

onn

3.45

316 St. St. / Carbon St.

See Bill of Material

18903-M20

3/4 x 1

800 ouu

1890L2-M20

Liquid

1/2 x 1

800 800

3.45

316 St. St. /

Carbon St.

See Bill of Material

1890L3-M20

3/4 x 1

General Notes:

1. For high temperature range (+401°F to 750°F / +205°C to +399°C) change fourth digit of type number from "0" to "2". Example: 18902-M20 becomes 18922-M20. Spring changes to Chrome Alloy, rust proofed.

2. Type numbers shown designate valves with plain screwed caps. Test lever required for air, steam or hot water service (above 140°F / 60°C). For packed lever change the three digit type number suffix from "-M20" to "-M40". Example: 18902-M20 becomes 18902-M40.

Serie 1890 - Farris Engineering - #1

Relief valve, Valve, Safety valve