Upload File

pressure/vacuum relief valve · vacuum: -2 mbar up to -7 mbar -0.8 inch w.c. up to -2.8 inch w.c....

  • Home
  • Documents
  • Pressure/Vacuum Relief Valve · Vacuum: -2 mbar up to -7 mbar -0.8 inch W.C. up to -2.8 inch W.C. Higher or lower settings upon request. External Control line* The main valve is controlled
4
408 KA / 9 / 1120 / GB All rights and modifications reserved in acc. with ISO 16016 - Current data sheet at www.protego.com Pilot-operated diaphragm valve Pressure/Vacuum Relief Valve PROTEGO ® VN-A-PCPF Settings: Pressure: +20 mbar up to +1034 mbar +8 inch W.C. up to +415.1 inch W.C. Vacuum: -2 mbar up to -7 mbar -0.8 inch W.C. up to -2.8 inch W.C. Higher or lower settings upon request. External Control line* The main valve is controlled by a pilot valve which is controlled by the tank pressure. A small amount of vapor is released into the atmosphere by the pilot valve when the valve opens. The set pressure is adjusted by increasing or decreasing the tension on the spring on the pilot valve. As the pressure increases, the closing force on the main valve increases, i.e., the valve becomes tighter with increasing tank pressure until the set pressure is reached. Once the valve has started to lift, it opens fully within a 10% of the pressure increase or opening pressure difference, and the nominal volume flow is released through a fully open valve. If and when this level is exceeded, the pressure increase will follow the performance curve (∆p/ V . curve). From set pressure to full capacity (fully open valve), the pressure increase is 100% in case of vacuum venting/in-breathing function. The tank pressure is maintained up to the set pressure with a tightness that is above the normal standards due to our highly developed manufacturing technology. This feature is ensured by valve seats made of high quality stainless steel with precisely lapped valve discs. After the overpressure is released or the vacuum is balanced, the valve re-seats and provides a tight seal. Special Features and Advantages • controlled by corrosion-resistant control valve (pilot valve) • small amounts of tank substance is released into the atmosphere when the valve is opened • max. 10% pressure increase up to full lift • extreme tightness, resulting in lowest possible product losses and reduced environmental pollution • set pressure close to opening pressure for optimum pressure maintenance in the system • protection of the main valve control diaphragm from low temperatures – high durability • high flow capacity • can be used in explosion hazardous areas • field test connection possible upon request • field test kit upon request Design Types and Specifications Basic design of pressure/vacuum relief valve with a control pilot valve Additional special devices available upon request. VN-A-PCPF * It is recommended that an external control line is to be provided with direct connection to the tank. Function and Description The PROTEGO ® Type VN-A-PCPF pilot-controlled diaphragm valve is a newly developed valve for pressure and vacuum relief. It is primarily used as a safety device for out-breathing in tanks, containers, and process equipment. It provides protection against vacuum and overpressure and prevents the intake of air and unallowable product vapor loss up to the set pressure. The valve can also be used as an in-breathing valve where the main valve is directly controlled when it is exposed to a vacuum, i.e., it functions as a weight-loaded diaphragm valve. e Ø 280 d 0 Ø c Ø d DN1 b g DN2 a f

Upload: others

Post on 04-Feb-2021

8 views

Category:

Documents


0 download

Report

TRANSCRIPT

  • 408 KA / 9 / 1120 / GBAll rights and modifications reserved in acc. with ISO 16016 - Current data sheet at www.protego.com

    Pilot-operated diaphragm valve

    Pressure/Vacuum Relief Valve

    PROTEGO® VN-A-PCPF

    Settings:Pressure: +20 mbar up to +1034 mbar +8 inch W.C. up to +415.1 inch W.C.Vacuum: -2 mbar up to -7 mbar -0.8 inch W.C. up to -2.8 inch W.C.Higher or lower settings upon request.

    External Control line*

    The main valve is controlled by a pilot valve which is controlled by the tank pressure. A small amount of vapor is released into the atmosphere by the pilot valve when the valve opens. The set pressure is adjusted by increasing or decreasing the tension on the spring on the pilot valve.As the pressure increases, the closing force on the main valve increases, i.e., the valve becomes tighter with increasing tank pressure until the set pressure is reached. Once the valve has started to lift, it opens fully within a 10% of the pressure increase or opening pressure difference, and the nominal volume flow is released through a fully open valve. If and when this level is exceeded, the pressure increase will follow the performance curve (∆p/V

    . curve). From set pressure to full capacity (fully

    open valve), the pressure increase is 100% in case of vacuum venting/in-breathing function.The tank pressure is maintained up to the set pressure with a tightness that is above the normal standards due to our highly developed manufacturing technology. This feature is ensured by valve seats made of high quality stainless steel with precisely lapped valve discs. After the overpressure is released or the vacuum is balanced, the valve re-seats and provides a tight seal.

    Special Features and Advantages• controlled by corrosion-resistant control valve (pilot valve)• small amounts of tank substance is released into the

    atmosphere when the valve is opened• max. 10% pressure increase up to full lift• extreme tightness, resulting in lowest possible product losses

    and reduced environmental pollution• set pressure close to opening pressure for optimum pressure

    maintenance in the system• protection of the main valve control diaphragm from low

    temperatures – high durability• high flow capacity• can be used in explosion hazardous areas• field test connection possible upon request

    • field test kit upon request

    Design Types and SpecificationsBasic design of pressure/vacuum relief valve with a control pilot valve

    Additional special devices available upon request.

    VN-A-PCPF

    * It is recommended that an external control line is to be provided with direct connection to the tank.

    Function and DescriptionThe PROTEGO® Type VN-A-PCPF pilot-controlled diaphragm valve is a newly developed valve for pressure and vacuum relief. It is primarily used as a safety device for out-breathing in tanks, containers, and process equipment. It provides protection against vacuum and overpressure and prevents the intake of air and unallowable product vapor loss up to the set pressure.The valve can also be used as an in-breathing valve where the main valve is directly controlled when it is exposed to a vacuum, i.e., it functions as a weight-loaded diaphragm valve.

    e

    Ø 280

    d0

    Ø c

    Ø d

    DN1

    b

    g

    DN

    2

    af

  • 409KA / 9 / 1120 / GBfor safety and environment

    Table 1: Dimensions Dimensions in mm / inches To select the nominal size (DN), use the flow capacity charts on the following pages.

    DN1 DN2 a b c d e f g100 / 4" 100 / 4" 225 / 8.86 225 / 8.86 250 / 9.84 360 / 14.17 991 / 39.02 205 / 8.07 418 / 16.46100 / 4" 150 / 6" 225 / 8.86 225 / 8.86 250 / 9.84 360 / 14.17 1001/39.41 205 / 8.07 428 / 16.85150 / 6" 150 / 6" 300 / 11,81 250 / 9.84 335 / 13.19 500 / 19.69 1104 / 43.46 275 / 10.83 503 / 19.80150 / 6" 200 / 8" 300 / 11,81 250 / 9.84 335 / 13.19 500 / 19.69 1124 / 44.25 275 / 10.83 523 / 20.59200 / 8" 200 / 8" 375 / 14.77 300 / 11,81 410 / 16.14 630 / 24.80 1237 / 48.70 340 / 13.39 610 / 24.02200 / 8" 250 / 10" 375 / 14.77 300 / 11,81 410 / 16.14 630 / 24.80 1267 / 49.88 340 / 13.39 640 / 25.20

    250 / 10" 250 / 10" 425 / 16.73 350 / 13.78 500 / 19.69 790 / 31.10 1357 / 53.43 420 / 16.54 710 / 27.96250 / 10" 300 / 12" 425 / 16.73 350 / 13.78 500 / 19.69 790 / 31.10 1377 / 54.41 420 / 16.54 730 / 28.74300 / 12" 300 / 12" 500 / 19.69 400 / 15.75 570 / 22.44 920 / 36.22 1468 / 57.80 485 / 19.09 803 / 31.61300 / 12" 350 / 14" 500 / 19.69 400 / 15.75 570 / 22.44 920 / 36.22 1488 / 58.59 485 / 19.09 823 / 32.40300 / 12" 400 / 16" 500 / 19.69 400 / 15.75 570 / 22.44 920 / 36.22 1508 / 59.37 485 / 19.09 843 / 33.19

    Table 2: Material selection for housing Design A B C

    * Special materials upon request.

    Housing Aluminum Stainless Steel LTCS * (Low Temperature Carbon Steel) Valve seat Stainless Steel Stainless Steel Stainless Steel Sealing - housing PTFE PTFE PTFE Sealing - valve disc Metal - to - Metal Metal - to - Metal Metal - to - Metal Housing diaphragm Stainless Steel Stainless Steel Stainless Steel Pilot lines Stainless Steel Stainless Steel Stainless Steel Pilot housing Aluminum Aluminum / Stainless Steel Aluminum / Stainless Steel Pilot diaphragm FEP FEP FEP

    Table 3: Flange connection typeEN 1092-1; Form B1

    Other types upon request.ASME B16.5 CL 150 R.F.

    Table 4: Coefficient of DischargeDN1 100 / 4" 100 / 4" 150 / 6" 150 / 6" 200 / 8" 200 / 8" 250 / 10" 250 / 10" 300 / 12" 300 / 12" 300 / 12"DN2 100 / 4" 150 / 6" 150 / 6" 200 / 8" 200 / 8" 250 / 10" 250 / 10" 300 / 12" 300 / 12" 350 / 14" 400 / 16"d0 108/4.25 108/4.25 160/6.30 160/6.30 208/8.19 208/8.19 262/10.31 262/10.31 310/12.2 310/12.2 310/12.2K 0.69 0.85 0.7 0.8 0.65 0.8 0.62 0.76 0.62 0.72 0.8

    DN1 = size inletDN2 = size outletd0 = orifice diameter (mm/inches)K = coefficient of discharge

  • 410

    flow rate V. (m³/h) Leistung-000515-en

    airflow in thousands of CFH

    pr

    essu

    re -

    inch

    W.C

    .

    10% overpressure

    VN-A-PCPF pressure

    pr

    essu

    re (m

    bar)

    DN1

    /DN2

    —

    flow rate V. (m³/h) Leistung-000519-en

    airflow in thousands of CFH

    va

    cuum

    - in

    ch W

    .C.

    100% overpressure

    VN-A-PCPF vacuum

    va

    cuum

    (mba

    r)

    DN1

    /DN2

    —

    KA / 9 / 1120 / GBAll rights and modifications reserved in acc. with ISO 16016 - Current data sheet at www.protego.com

    The flow capacity charts have been determined with a calibrated and TÜV certified flow capacity test rig.Volume flow V

    . in (m³/h) and CFH refer to the standard reference conditions of air in ISO 6358 (20°C, 1bar).

    For conversion to other densities and temperatures, refer to Sec. 1: “Technical Fundamentals.”

    Flow Capacity Charts

    Pressure/Vacuum relief valve

    PROTEGO® VN-A-PCPF

  • 411KA / 9 / 1120 / GBfor safety and environment

    Flow Capacity Charts

    Pressure/Vacuum relief valve

    PROTEGO® VN-A-PCPF

    pres

    sure

    (mba

    r)

    airflow in thousands of CFH

    pr

    essu

    re -

    inch

    W.C

    .

    flow rate V. (m³/h) Leistung-000514-en

    VN-A-PCPF pressure

    10% overpressure

    DN1

    /DN2

    —

    va

    cuum

    (mba

    r)

    airflow in thousands of CFH

    va

    cuum

    - in

    ch W

    .C.

    VN-A-PCPF vacuum

    flow rate V. (m³/h) Leistung-000518-en

    100% overpressure

    DN1

    /DN2

    —

    Remark: Technical Data Sheet see on page 415.


TOC - Process Catalog - Airflow Meters, Airflow Measurement · Velocity Pressure (IN w.c.) = Total Pressure (IN w.c.) – Static Pressure (IN w.c.) Air velocity, expressed in feet

A B C D E F C HALL 1 HALL 2 A F A B C D E F D E · 2016-03-15 · 4.19 4.17 4.15 4.13 4.11 4.9 4.7 4.5 4.3 4.1 4.c 4.b 4.a w.c. w.c. cafeteria cafeteria w.c. w.c. w.c. w.c. cafeteria

Móveis W.C

KEEP FOODFRESH - Besser vacuum€¦ · 2,0 mbar 2,0 mbar 2,0 mbar 2,0 mbar Highlights Display digitale Display semplificato facilissimo da usare anche per non esperti Pulizia facile

W.C. Mgmt Project

W.C. Gentry evaluation

PROTEGO Pressure/Vacuum Relief Valves - … (Tank-) nozzle size DN and maximum allowable (tank-) pressure p in mbar (inch W.C.) Desired: fl ow rate of valve in m3/h (CFH) and set

Fallo W.C. y nota

Spring Garden Map and Highlights Shinjuku Gyoen …...Cherry Blossom Seasonal Flower ・・・ ・・・ W.C. W.C. W.C. WW.C.C. W.C. W.C. W.C. Shinjuku Gyoen National Garden Spring

W.C. Grinder - Poster

PLAN FORM-2014-W.C

8B 18B ñfj W.C. W.C. R 135 20 : 50—21 : oo :00) 2222 W.C ...89%D4...8B 18B ñfj W.C. W.C. R 135 20 : 50—21 : oo :00) 2222 W.C. 21 :oo) 8231 0381 Jill 7 : 00—22 : OO 7916 0557—85—

Messgeräte für Druck und Kälte · 2011 Zeichen setzen für die Zukunft hPa mbar Pa mm H2O inch H2O inch Hg mm Hg psi m/s fpm Messgeräte für Druck und Kälte 01-098X-702X-Title

Mbar connectesamc 2015

gas-druckregelgerät HON 372 - honeywellprocess.com · LP 1047 TX002 TX003 3,7 4,5 blau lichtblau 15 mbar bis 140 mbar 25 mbar bis 200 mbar 150 mbar bis 500 mbar MP 1047 TX002 TX003

W.C. Extrem

INNOx B - Ferroli · 2020. 9. 29. · Pression max. brûleur 14,3 mbar 17,8 mbar 36,0 mabr Pression min. brûleur 4,2 mbar 5,2 mbar 10,7 mbar Pression d'alimentation gaz 18÷25 mbar

W.C. Minger Liner Notes

PRESSURE SWITCHESPRESSURE SWITCHES · 0,5 bar 0,5 bar 0,5 bar 0,5 bar 1 bar 1 bar 1 bar 4 mbar 4 mbar 4 mbar 6 mbar 6 mbar 10 mbar 10 mbar-1-3.25 PED 2014/68/EU These diaphragm pressure

W.C. ELA Review: 6.2.1 W.C. focus: Sahara Vegetation

Best work w.c 16.12.13

Bloom Engineering Company, Inc. BPC102011 1020 Series2 1020 Series Bulletin Table 1 -Performance and Selection Chart -Fast Heat Release1 (Short Flame) -12" w.c. (30 mbar) Air Pressure*

Messgeräte für Druck und Kälte - Meinhausshop.de...2011 Zeichen setzen für die Zukunft hPa mbar Pa mm H2O inch H2O inch Hg mm Hg psi m/s fpm Messgeräte für Druck und Kälte 01-098X-702X-Title

w.c. report

El w.c. d._

SYNTHESIS 12/100 V GAS - Gastro Germany...SYNTHESIS 12/100 V GAS G31 - 50 mbar G31 - 50 mbar G31 - 50 mbar 28 mbar Collegamento gas Gas connection Conexión gas ISO 7 – (filettatura

Biography of W.C. Hunt

iPhoto Plus - 1 - Forum chauffage · Installationsanleitung Vaillant Thermoblock VCW 184XEU, VCW 244XEU Ihr Partner für Heizen, Regeln, warmes Wasser. mbar kW mbar kW mbar mbar kg/h

February 2014 Type HSR Pressure Reducing Regulator for ...kfngs.com/data/catal/Type HSR ENG_IM.pdfType HSR 5 Figure 4. 7-inch w.c. / 17 mbar Setpoint Relief Curves (with lever disconnected,

B42 Series Regulator - ISTEC Corp · 5 14" w.c. (34 mbar) - B42 Residential Regulator Capacity Table (2” Droop) - Models N, R B42 RELIEF CURVES - LEVER DISCONNECT 14" W.C. SET POINT

METRIS 250 - Itron · METRIS 250 METRIS RM Meter Capacity 250 CFH Natural Gas @ .5 inch w.c. Differential 400 CFH Natural Gas @ 1.0 inch w.c. Differential Hub Center-to-Center 6"

Wheeler, W.C. 2006

 · 2013-09-06 · GRADE XA NH3 0.01 micron 0.01 mg/m3 100 mbar 300 mbar mbar 16 barg GRADE Xl NH3 I micron 0.1 mg/m3 75 mbar 150 mbar 400 mbar 16 barg Maximum oil carryover at 200C

Product Bulletin: OSE Slam-Shut Valve - emerson.com OSE slam-shut valve can be used for all pressure ranges from 4.02 in. w.c. to 1470 psig / 10 mbar to 101 bar by simply replacing

Series 65 - vatskk.co.jp · Typci al col sni g / opening time Open Weight → closed Closed → open mm inch ls-1 ls-1 mbar mbar bar psi s s s kg lbs 100 4 1 700 31 200 304 – 7