Emerson 92S Arkusz Danych Pobierz pdf (Strona 1)

Bulletin 71.2:92S

D100621X012

December 2011

www. sherregulators.com

Type 92S Pilot-Operated Steam Regulator

Introduction

The Type 92S steam regulator is piston actuated for

high cycle steam service which includes a Type 6492L,

6492H, or 6492HT pilot (see Figure 1). These pilots

have bellows sealed stems to eliminate stem guide

friction. The valve and pilot use lapped seating surfaces

that have been proven to minimize seat leakage.

Features

• Good Shutoff for Low Downstream Build-up—

Type 92S main valve and Types 6492H, 6492L, and

6492HT pilots are machine-lapped seating surfaces

that have been time-proven to minimize seat leakage

when the downstream demand is zero and the

regulator is shutoff.

• Resistance to Piping Stresses—Steel

constructions are available to help resist the piping

stresses commonly encountered in steam applications.

• Ease of Installation—Compact construction

reduces installation space requirements. Supply of

pressure to the pilot is supplied from the inlet side

of the main valve through factory piped tubing;

with a standard pilot, this means no separate pilot

supply pressure is required.

• Increased Sensitivity to Downstream Pressure

Changes—Friction-reducing bellows seal on

the pilot stem and large pilot diaphragm areas

yield good sensitivity.

• Ease of Pilot Maintenance—Pilot valve plug and

seat can be removed for inspection of maintenance

without disassembling piping connections and

without removing the diaphragm. Pilot inlet screen

(Figure 2) is easily removed with the seating

parts for inspection and cleaning. Diaphragm can

be removed without disturbing the seating parts.

• Noise Reduction Capability Without Decrease

in Capacity—A noise attenuation trim is

available for use with NPS 2 / DN 50 and larger

main valve sizes to provide an economical yet

full- ow means for the reduction of noise from high

velocity steam  ow. Further noise reduction of

the system can be achieved by the use of a heavier

piping schedule and/or thermal insulation of the

attached piping.

W4086_3

1 NPT STEEL

MAIN VALVE WITH TYPE 6492H OR 6492HT PILOT

W4088_1

NPS 3 / DN 80 FLANGED CAST IRON

MAIN VALVE WITH TYPE 6492L PILOT

Figure 1. Type 92S Pilot-Operated Steam Regulator

1 2 3 4 5 6 ... 15 16

Bulletin 71.2:92S 1

Podsumowanie treści

Strona 1 - Bulletin 71.2:92S

Bulletin 71.2:92SD100621X012December 2011www. sherregulators.comType 92S Pilot-Operated Steam RegulatorIntroductionThe Type 92S steam regulator is pi

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Bulletin 71.2:92S10A3330/ILOUTLET PRESSURE, psigFLOW kg/h OF SATURATED STEAMOUTLET PRESSURE, barFLOW, POUNDS/HOUR OF SATURATED STEAM1000 2000

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Bulletin 71.2:92S11Table 5. Flow Capacities in Pounds per Hour / kg/h of Saturated Steam- continued -OUTLET PRESSURE SETTING(1) PILOT TYPE NUMBERINLE

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Bulletin 71.2:92S12Table 5. Flow Capacities in Pounds per Hour / kg/h of Saturated Steam (continued)Table 6. Noise Level Data in Decibels with Sched

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Bulletin 71.2:92S13Table 6. Noise Level Data in Decibels with Schedule 40 Downstream Piping and No Insulation(1)(continued)P1PERCENTAGE OF MAXIMUM RE

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Bulletin 71.2:92S141/4 NPT CONTROL LINE CONNECTION ON BACKSIDEBETRIM REMOVAL CLEARANCEA/2A17A8559-AB1904RSNPS 1, 1-1/2, OR 2 / DN 25, 40, OR 50 MAIN V

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Bulletin 71.2:92S15Body Size (Select One) NPS 1 / DN 25** NPS 1-1/2 / DN 40** NPS 2 / DN 50*** NPS 2-1/2 / DN 65* NPS 3 / DN 80** N

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Bulletin 71.2:92S2SpecicationsMain Valve Body Sizes and End Connection StylesBODY SIZESEND CONNECTION STYLES AND RATINGSCast Iron BodySteel orStainle

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Bulletin 71.2:92S3Specications (continued)Maximum Temperature Capabilities(1) Cast Iron Main Valve and Pilot: 406°F / 208°C Steel Main Valve and

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Bulletin 71.2:92S4 • Lapped Seats for Tight Shutoff—The valve and pilot use lapped seating surfaces that have been proven to minimize se

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Bulletin 71.2:92S5NPS 1, 1-1/2, OR 2 / DN 25, 40, OR 50 MAIN VALVE BODY AND TYPE 6492H OR 6492HT PILOTFigure 2. Type 92S Pressure Reducing Regulator

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Bulletin 71.2:92S6TE0402Figure 3. NPS 1, 1-1/2, and 2 / DN 25, 40, and 50 Type 92S Pilot-Operated Pressure Reducing Regulator with Safety Override Pi

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Bulletin 71.2:92S7TYPESPRING RANGESPRING COLOR PART NUMBERMINIMUM PRESSURE AT WHICH MONITORING PILOT CAN BE SETpsig bar6492HM10 to 30 0.69 to 2.1 Yel

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Bulletin 71.2:92S8Type 92S Pilot-Operated Pressure Reducing Regulator with Safety Override PilotA Type 6492HM or 6492HTM safety override pilot is avai

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Bulletin 71.2:92S9Figure 6. NPS 2-1/2, 3, and 4 / DN 65, 80, and 100 Piping SchematicsTYPE 92S MAIN VALVETYPE 6492H PILOTBOTTOM VIEWNoise level value