¾" / 1" J125 MKII Example illustrated is a J125S4 version with USS Over Pressure Slam Shut option. Inlet Pressures up to 8.6 Bar The MKII Jeavons J125 service regulator is fitted with an improved lever mechanism and can be supplied with the USS safety shutoff assembly. DTSHEET CS22 ISSUE C MY 1998
PPLICTION The J125 series provides a full range of regulators for service applications where accurate pressure control is required. The units are ideal for industrial pressure reducing, metering stations and for district distribution. monitor version of the J125 is also available. The regulators are designed to maintain high accuracy and efficiency over the inlet pressure range of 70mb 8.6bar (1125 PSIG). The 3/4" and 1" sizes are available with screwed connections and the 1" is also available with flanged connections (25mm). Several valve orifices are available to cover the full inlet pressure range, together with a comprehensive number of outlet pressure springs. The unit has been designed for ease of installation and servicing in confined areas. The diaphragm case can be fully rotated and, during inspection and servicing, the case can be removed without disturbing the pipework. OPTIONS ll units are suitable for operation on natural, liquid petroleum and manufactured gases. Various versions of this regulator comply with the requirements of BGC/PS/E26, IGE/TD/10, DIN3380, DIN3381, Dannish DGP, BS3016 and numerous international specifications. The USS unit is designed to meet the requirements of the standards BGES/V9, TN02, DIN33822 & DIN3381. SIZES 3/4" x 3/4", 3/4" x 1", 1" x 1" and 25mm x 25mm. NORML OPERTING TEMPERTURE 20 C to +70 C. CONNECTIONS Taper or parallel screwed to BS21 Flanged to DIN, BS EN 10922 NP16 The J125 can be fitted with a full or limited capacity relief valve. In addition, the regulator can be supplied with the Jeavons Universal Safety Shutoff ssembly (USS). This provides overpressure and/or underpressure protection with immediate shutoff at the regulator inlet. It uses well proven principles to give exceptional consistency of operation and an unrivalled insensitivity to nuisance tripping. SCHEMTIC INSTLLTION DIGRM OPSS SPRINGS mb " WC 18 60 7.5 24 J6 281 Black SPRINGS ll Springs are colour coded for ease of identification. 50 80 60 210 20 32 24 44 40 84 J6 282 J6 283 J6 284 Orange Red Dark Green mb " WC 200 350 3 5 PSI J6 287 Yellow 5 15 2 6 J6 041 Lt Green / Yellow 280 4 7 PSI J6 288 White 12 25 22 35 32 50 45 75 72 140 4.8 10 8.8 14 12.8 20 18 30 29 56 J6 042 J6 043 J6 044 J6 045 J6 046 Lt Green / Black Lt Green / Orange Lt Green / Brown Lt Green / Red Lt Green / Dk Blue UPSS SPRINGS mb " WC 8 16 3 6 16 60 6 24 60 150 24 60 J6 285 J6 286 J6 289 Light Blue Brown Purple DTSHEET CS22 ISSUE C MY 1998
J125 VERSIONS The following table indicates the code numbers for the various J125 versions available. TYPE Full Capacity Relief (FR) Limited Capacity Relief (LR) Over Pressure Slam Shut (OPSS) Under Pressure Slam Shut (UPSS) Safety Diaphragm Unit Weight (kg) Screwed Flanged J125 S1 J125 S2 J125 S3 J125 S4 J125 S5 J125 S6 J125 S7 J125 S8 J125 S9 J125 S10 J125 S11 J125 S12 J125 S13 J125 S14 J125 S1/S2/S3 SCREWED J125 S1/S2/S3 FLNGED 101 38 195 53 195 J125 S4 S14 SCREWED J125 S4 S14 FLNGED 101 88 88 133 195 148 195 DTSHEET CS22 ISSUE C MY 1998
RELIEF VLVE PERFORMNCE OUTLET PRESSURE BR 140 120 80 60 40 20 Orifice 10 Orifice 8 Orifice 5 Orifice 3.5 1 2 3 4 INLET PRESSURE BR ORIFICE SIZES ND INLET PRESSURES Orifice Size (mm) 3.5 5 8 10 MTERIL SPECIFICTION Description Regulator Body Valve Seat Regulator and USS Valve Spindle Regulator Diaphragm Relief Valve, Spring Holders, USS Internals Springs USS Face Plates Maximum Inlet Pressure 8.6 bar (125 PSI) 5.2 bar (75 PSI) 2.4 bar (35 PSI) 1.7 bar (25 PSI) Regulator Valve Disc and "O"Rings, USS Diaphragm, Safety Diaphragm USS Valve Disc and "O"Rings Regulator Valve, USS Valve Regulator Case and Cover, USS Body and Cover Lever rm, Regulator Diap Plate, Vent Valve Plates, Clamping Plate For optimum regulator performance, the largest permissible orifice size should be selected from this table. For the optimum relief valve performance, the smallest orifice should be selected. Material Nodular Iron BS2789 Brass BS2874 Nitrile Synthetic Rubber (Buna) Nitrile Synthetic Rubber (DIN 3535 Part 3) luminium lloy BS4300/5 luminium lloy BS1490 Stainless Steel BS970 Reinforced Synthetic Rubber cetal Resin Mild Steel, Zinc Plated and Passivated Carbon Steel, Zinc Plated and Passivated Stainless Steel BS3 PERFORMNCE Detailed performance data is provided on separate technical bulletins. SERVICING The J125 has been designed for ease of access, inspection and servicing of all the internal conponents. soft spares kit is available for all versions. QULITY Elster Jeavons is committed to a programme of continuous quality enhancement. ll equipment designed and manufactured by Jeavons benefits from the company's quality assurance standards, which are approved to ISO 9001 (BS5 Part 1). Elster Jeavons has a programme of continuous product development and improvement and in consequence the information in this leaflet may be subject to change or modification without notice. DTSHEET CS22 ISSUE C MY 1998 ELSTER JEVONS Ltd. Tel: +44 (0)121 557 3911 Lower Church Lane, Tipton Fax: +44 (0)121 520 9556 West Midlands DY4 7PH England Email: info@jeavonsltd.co.uk
MkII 1" / 25mm SERVICE Capacities in SCMH 0.6sg gas Droop = 20% 3.5mm Orifice Spring Range (mbar) Setting Pressure (mbar) Inlet Pressure (mbar) 0 1 0 3000 3 4000 0 6000 7000 8000 5mm Orifice 0 1 0 3000 3 4000 0 8mm Orifice 0 1 0 10mm Orifice 50 0 1 1700 5 15 10 6.2 8.4 11.7 15.5 16.7 18.5 22.0 28.8 33.1 36.5 51.3 65.7 8.3 18.3 25.1 28.4 32.8 36.7 43.6 50.9 59.1 66.3 72.4 85.8 13.6 15.5 36.6 52.6 63.5 75.7 81.2 105.3 118.4 13.3 14.4 62.1 76.8 91.4 102.4 113.5 12 25 20 5.5 7.7 10.9 13.7 16.5 18.4 20.7 25.3 28.3 32.1 36.0 51.3 65.7 9.9 16.8 23.0 28.9 32.4 36.5 43.6 50.3 57.6 64.9 71.9 85.8 12.8 21.2 38.4 53.4 62.1 72.4 78.9 92.1 111.9 8.4 13.7 62.8 8 9 105.3 113.5 CPCITY CHRT 22 35 32 50 45 75 30 40 60 5.7 6.2 5.9 9.1 9.7 9.7 12.0 12.4 12.5 14.1 14.0 14.0 15.7 15.6 15.6 17.8 17.3 17.3 20.5 20.4 20.3 24.7 23.9 23.9 27.8 27.9 27.6 31.3 30.9 30.9 34.9 3 3 44.0 44.1 44.1 51.4 51.5 51.2 58.2 58.3 58.4 65.7 65.7 65.7 10.0 10.0 10.4 17.4 15.7 16.1 23.4 21.2 22.8 28.5 28.6 27.2 32.4 32.6 32.6 35.5 35.9 36.4 42.7 24.7 42.8 49.9 50.2 51.2 57.1 58.0 58.2 63.7 65.1 65.1 71.6 72.6 72.0 85.8 85.8 85.9 12.1 11.3 9.4 21.0 21.2 21.0 38.4 35.8 34.7 51.9 49.4 49.4 62.5 62.9 63.9 77.3 73.1 76.4 87.2 84.0 83.9 103.6 104.2.3 121.7 120.7 116.8 6.9 12.9 11.9 9.8 27.4 26.3 45.4 42.0 65.6 62.1 62.5 81.5 76.8 73.1 93.6 91.0 87.7 106.7 107.8 104.1 117.8 115.2 115.2 72 140 5.6 8.9 11.9 14.8 16.5 18.1 21.7 24.6 28.3 31.9 35.5 42.8 51.1 65.8 9.3 15.3 19.2 26.1 30.7 34.6 41.5 49.7 57.4 64.3 72.9 85.9 14.9 29.2 40.2 47.5 55.9 65.8 8 108.2 21.9 34.7 53.0 73.1 89.6 94.9 104.2 DTSHEET DS23 ISSUE MY 1997