CROSBY H-SERIES DIRECT SPRING SAFETY VALVES
92Pages

{{requestButtons}}

Catalog excerpts

CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 1

EMERSON. CROSBY H-SERIES DIRECT SPRING SAFETY VALVESDirect spring safety valves that provide comprehensive overpressure protection for ASME Boiler and Pressure Vessel Code Section I, and Section VIII steam safety applicationsFEATURES HCI ISOFLEX' • ASME/NB certified capacities for steam. • Set and tested on steam. • Full nozzle flanged option. • Restricted lift for customized capacity. • Long service life. • Low maintenance. • Two ring set pressure and blowdown control. • ISOFLEX seat tightness up to 93%. For seat tightness greater than 93% consult factory. TECHNICAL DATA GENERAL APPLICATION H-Series direct spring operated safety valves are the proven solution for comprehensive overpressure protection on steam safety applications including economizers, steam drums, superheaters, reheaters and more. Sizes: Orifices: Connections: Temperature range: Set pressures: IVi" F IV2" to 6" RR 10" 0.307 to 19.29 in2 (1.98 to 124.45 cm2) Flanged or welded inlet 1120 °F (604 °C) 15 to 5000 psig (1 to 345 barg) Code: ASME Boiler and Pressure Vessel Code Section I, and Section VIII Emerson.com/FinalControl © 2017 Emerson. All Rights Reserved VCTDS-00595-EN 17/11

Open the catalog to page 1
CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 2

Complete overpressure protection for ASME B&PVC Section I A complete safety valve package for utility and industrial steam generators and steam systems. • Boilers with design pressures to 3000 psig (207 barg). • Valves designed to increase plant up-times, extend maintenance intervals and increase total valve life. Steam System Components 7. Boiler feed water pump 8. Cold reheat inlet VALVE SELECTION APPLICATIONS AND RECOMMENDED™ VALVE SELECTION NOTES 1. Selection matrix shows valves in optimum locations - Styles HSJ and HCI may be interchanged to suit a specific application or to obtain a...

Open the catalog to page 2
CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 3

STYLE HE ISOFLEX® Style HE ISOFLEX® safety valves are high pressure, high capacity reaction type valves designed specifically for saturated steam service on boiler drums with design pressures above 2000 psig (138 barg) up to critical pressure. FEATURES TECHNICAL DATA • Extends Up-time - ISOFLEX® seat tightness to 93% of set pressure ensures maximum generating times, extending maintenance intervals. For seat tightness greater than 93% consult factory. • Reduces Maintenance Costs - Exceptional seat tightness minimizes maintenance resources and repair times and reduces spare parts purchase and...

Open the catalog to page 3
CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 4

PRODUCT OVERVIEW The HE ISOFLEX incorporates our latest field proven seat tightness design which allows boilers to operate close to set pressure without leakage across the valve seat. The HE ISOFLEX also has a unique patented eductor control that permits the valve to attain full capacity lift at a pressure 3% above popping pressure to the requirements of Section I of the ASME Boiler and Pressure Vessel Code. APPLICATION The HE ISOFLEX safety valve is a high pressure, high capacity reaction type valve, designed specifically for saturated steam service on boiler drums having design pressures...

Open the catalog to page 4
CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 5

CROSBY H-SERIES STYLE HE ISOFLEX 28 Part name Body Nozzle Nozzle ring Nozzle ring set screw Disc insert Disc holder Disc holder retaining nut Eductor Guide ring Guide ring set screw Spindle assembly Piston Piston retaining ring Spindle nut Bonnet Bonnet studs Bonnet stud nuts Material Carbon steel SA-216 Gr. WCC Stainless steel Stainless steel Stainless steel Inconel® Nickel alloy Stainless steel Nickel alloy Stainless steel Stainless steel Stainless steel Nickel alloy Steel Steel Carbon steel SA-216 Gr. WCC Alloy steel SA-193 Gr. B7 Steel SA-194 Gr. 2H Bottom spring washer Top spring...

Open the catalog to page 5
CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 6

2500 psig maximum pressure 1. These style designations are for standard welded inlets. For optional CL 2500 flanged inlet valves, the "W" is dropped from the style designation. 2. Weld prep per customer's specifications. Safety valves must be mounted on a nozzle with an inlet diameter equal to or greater than the nominal valve inlet size, dimension A. See ASME boiler and pressure vessel code Section I and ANSI/ASME B31.1 for recommended installation. 3. Bolt holes straddle centerline on flanged connections. 4. Dismantling height: an additional 20 inches (508 mm) is required. Drain: main...

Open the catalog to page 6
CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 7

1 Increases Operating Efficiency Sizes: - Restricted Lift Option for customized capacity, reduced reaction forces, and boiler design standardization Orifices: - Seat tightness up to 93% of valve set pressure. For seat tightness greater than Connections: 93% consult factory - Two ring control to adjust overpressure and Maximum blowdown independently temperature: - May also be used for ASME Boiler and Maximum Pressure Vessel Code Section VIII off boiler set pressure: steam applications for higher operating Codes: pressures 1 Reduces Maintenance Costs CROSBY H-SERIES STYLE HCI ISOFLEX DIRECT...

Open the catalog to page 7
CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 8

CROSBY H-SERIES STYLE HCI ISOFLEX PRODUCT OVERVIEW The HCI ISOFLEX safety valve is a high capacity nozzle type valve suitable for saturated and superheated steam service. The valves are available in inlet sizes of 1½”, 2", 2½”, 3", 4" and 6" and in orifice sizes H2 to RR specifically designed for the power industry. Welded inlets and flanged outlets are standard, with flanged inlets (1) with full (removable) nozzles (2) also available. Blowdown control is precise with two adjustable rings (3 and 12) - one each on the nozzle (1B or 2) and guide (11). Blowdown may be adjusted from 2 to 4%...

Open the catalog to page 8
CROSBY H-SERIES DIRECT SPRING SAFETY VALVES - 9

Part ref. Material and maximum temperature Spare parts 8123 Lift stop Stainless steel Stainless steel Stainless steel 9 Disc holder retainer Stainless steel Stainless steel Stainless steel 1 cotter 102 Lift stop cotter Stainless steel Stainless steel Stainless steel 1 11 Guide Nickel alloy Nickel alloy Nickel alloy 2 12 Guide ring Stainless steel Stainless steel Stainless steel 3 13 Guide ring set screw Stainless steel Stainless steel Stainless steel 14 Spindle assembly Stainless steel Stainless steel Stainless steel 2 15 Spring Alloy steel Alloy steel High temp. Corrosion Corrosion alloy...

Open the catalog to page 9

All Emerson Automation Solutions - TESCOM catalogs and technical brochures

  1. 26-2000 Series

    16 Pages

  2. WEGA-SP

    4 Pages

  3. DH-16 SERIES

    4 Pages

  4. SG1 SERIES

    8 Pages

  5. 56 SERIES

    4 Pages

  6. ER5000 Series

    12 Pages

  7. Level

    3 Pages