SELF-ACTUATING DIFFERENTIAL PRESSURE AND FLOW REGULATORS TYPE ZSN91; 92

Transcription

1 APPLICATION AREA: SELF-ACTUATING DIFFERENTIAL PRESSURE AND FLOW REGULATORS TYPE ZSN91; 92 Regulators ZSN91; 92 are used to control preset pressure difference and fl ow in process installations connected to inlet or outlet of regulator valve. Regulators are applied in heating systems, in industrial processes with cold and hot, steam, air, and non-fl ammable gases. Using with other media subject to consulting with manufacturer. DESIGN: Regulator comprises three, temporarily connected, main units: valve (01), actuators (02A and 02B), and adjuster (03). Regulator valve single-ported with balanced plug, and fl ow rate preset value adjuster in the form of gradually adjusted packing gland. Flanged connections of valve body with valve face as per PN-EN :2006 and PN-EN :1999 for PN10; 16; 25; 40 PN-EN :2005 for CL150; CL300. Body length as per: PN-EN :2000 Series 1 for PN10; 16; 25; 40; Series 37 for CL150; Series 38 for CL300 Diaphragm actuator (diaphragm effective area 160/160 cm 2 or 160/320 cm 2 ), with bolted housing, where comparison of pressure difference impulses from controlledfl ow rate and controlled pressure difference is held. Control pressure value adjuster with combination of three pre-tensioned springs,fi xed coaxially with valve and actuator. VARIANTS: By valve leakage class: below 0.01%Kvs (class IV as per PN-EN ) - hard seat bubble (class VI as per PN-EN ) - soft seat - PTFE or VMQ (ECOSIL) By application: on the supply side ZSN 91 on the return side ZSN 92 By corrosion-proofness of actuator components: standard (ZSN 91.1; ZSN 92.1) - carbon steel with protection coatings, special (ZSN 91.2; ZSN 92.2) - stainless steel. By pressure drop on packing gland: p D = 20 [kpa] p D = 50 [kpa] POLNA corp. s.r.o. Oldřichovice Třinec-Oldřichovice Czech Republic phone: fax: info@polnacorp.eu web: bank account: ČSOB a.s.,třinec / CZK /0300 ČSN EN ISO 14001: EUR ČSN EN ISO 9001:2005 IČ: , DIČ: CZ The company is incorporated in the Companies Register with the Regional Court in Ostrava, Section C, Inset No

2 OPERATING PRINCIPLE: Regulator valve is open when no supply. Regulator controls fl ow comparing it with preset packing gland (12) value, and pressure difference, comparing it to preset adjuster (03) value. Both control systems fl ow and pressure difference operate independently. Plug position is determined by the value which deviates more from preset value. Flow control consists in presetting constant pressure difference of p D =20 kpa or p D =50 kpa, corresponding to desired fl ow, in packing gland (12), and transferring this pressure difference via impulse ducts to actuator (02A). Each change in fl ow rate exceeding desired value shall cause change in pressure difference regarding packing gland value and pro rata change in plug position, until fl ow rate reaches desired value. Control of pressure difference p R is achieved by presetting desired value of controlled pressure difference in adjuster (03) and transferring it via impulse ducts from measurement point to actuator (02B). Each deviation from fl ow rate regarding adjuster value shall cause pro rata change in plug position, until controlled pressure difference reaches preset value. Regulator only requires impulse tube for connection to lower or higher pressure, regarding installation method on supply or return pipeline, as per the diagram illustrating application examples hereinafter. DIMENSIONS AND WEIGHTS DN Actuator type A B C H L Valve weight(01) (02A and 02B) [mm] [kg] , , , , , , , , ,7 Weight Spring range Actuator Actuator Adjuster (03) [kpa] (02A - 02B) (02A - 02B) DN DN ,2 3, ,0 6, , ,4 2, ,2 3,6 206 Self-actuating differential pressure and fl ow regulators Type ZSN 91; 92

3 TECHNICAL SPECIFICATIONS K VS 1) [m 3 /h] DN full flow 3, , Noise coefficient Z 0,65 0,6 0,55 0,45 0,4 0,35 Control characteristics proportional Spring range [kpa] 2) ; ; ; , , Flow values for pressure drop in packing gland [bar] Seeting ranges for p D = 20 [kpa] flow rates by pressure p drop in packing gland D = 50 [kpa] Valve nominal pressure Maximum medium temperature [ C] Minimum pressure drop in valve 1) other K vs ratios subjecto to order specifi cation. 2) other ranges subject to order specifi cation % K VS 7 75% K VS valve body in grey iron PN 16 valve body in spheroidal iron PN 16; PN 25; PN 40 valve body in carbon steel and stainless steel PN 16; PN 25; PN 40 steam, water 150 gases 80 2 Q pz = pd +( ) 2 Kv MATERIALS as per PN Regulator ZSN 91 ZSN 92 VALVE (01) grey iron EN-GJL-250 Body spheroidal iron EN-GJS LT carbon steel GP240GH (1.0619) stainless steel GX5CrNiMo (1.4408) Plug and seat Guide sleeve X6CrNiMoTi (1.4571) Packings EPDM 3) ACTUATOR (02) Housing carbon steel S235JRG2C (1.0122) stainless steel X6CrNiTi (1.4541) Stem X17CrNi 16-2 (1.4057) Diaphragm EPDM + polyester fabric3 3) Packing EPDM 3) Adjuster (03) Adjuster components Carbon steel C45 (1.0503) Springs Spring steel 60Si7 3) other materials, subject to medium type. NOMINAL PRESSURE, WORKING TEMPERATURE AND WORKING PRESSURE FLOW DIAGRAM FOR WATER Self-actuating differential pressure and fl ow regulators Type ZSN 91;

4 INSTALLATION Regulator is to be installed on horizontal pipeline. Medium fl ow direction is to conform to arrow on body. At medium temperature lower than 100 C regulator position is optional, at higher temperatures it is recommended to install regulator with adjuster unit (03) down. To ensure reliable operation of regulator apply strainer FS1 upstream. EXAMPLES OF APPLICATION Monitoring p = p 1 -p 2 and V restriction RETURN SIDE SUPPLY SIDE Existing connections Connections to be added (pipe 6 x 1) ACCESSORIES Delivered: Optional (ordered separately): - nut and cutting ring for impulse tube, - strainer FS1, - straight connection pipe 6 1, - elbow connection pipe 6 1, - connection stub NPT 1/4, - impulse tube 6 1, - adjustment wrench, ORDERING In your order specify type and marking, ZSN91.1; ZSN91.2 or ZSN92.1 or ZSN92.2, DN nominal diameter, PN nominal pressure, fl ow ratio K vs, packing gland pressure drop value, body material, spring range, closure type (only for tight executions). Example of order: ZSN DN 50; PN 16; Kvs 32; 20 [kpa], spheroidal iron; [kpa], tight. 208 Revision: ZSN91; 92/08/2007 Valid until the next revision.

5 SELF-ACTUATING DIFFERENTIAL PRESSURE AND FLOW REGULATORS TYPE ZSN9 APPLICATION AREA: Regulators ZSN9 are used to control preset pressure difference and control fl ow in process installations connected to inlet or outlet of regulator valve. Regulators are applied in heating systems, in industrial processes with cold and hot water, steam, air and non-fl ammable gases. Using with other media subject to consulting with manufacturer. DESIGN: Regulator comprises four, temporarily connected, main units: valve (01), actuator (02), adjuster (03), and fl ip-fl op (04). Regulator valve singleported with balanced plug, and fl ow rate preset value adjuster in the form of gradually adjusted packing gland. Flanged connections of valve body with valve face as per PN-EN :2006 and PN-EN :1999 for PN10; 16; 25; 40 PN-EN :2005 for CL150; CL300. Body length as per: PN-EN :2000 Series 1 for PN10; 16; 25; 40; Series 37 for CL150; Series 38 for CL300 Diaphragm actuator (diaphragm effective area 160; 320 cm 2 ), with bolted housing. Controlled pressure difference value adjuster fi xed coaxially with valve and actuator. Impulse, pressure difference and fl ow rate fl ip-fl op of slider-piston type, where comparison of controlled pressure difference and controlled fl ow rate impulses is held. VARIANTS: By valve leakage class: below 0.01%Kvs (class IV as per PN-EN ) - hard seat, bubble (class VI as per PN-EN ) - soft seat - PTFE or VMQ (ECOSIL). By corrosion-proofness of actuator components: standard (ZSN 8.1) - carbon steel with protection coatings, special (ZSN 8.2) - stainless steel. POLNA corp. s.r.o. Oldřichovice Třinec-Oldřichovice Czech Republic phone: fax: info@polnacorp.eu web: bank account: ČSOB a.s.,třinec / CZK /0300 ČSN EN ISO 14001: EUR ČSN EN ISO 9001:2005 IČ: , DIČ: CZ The company is incorporated in the Companies Register with the Regional Court in Ostrava, Section C, Inset No

6 OPERATING PRINCIPLE: Regulator valve is open when no supply. Regulator operation consists in positioning of packing gland (12) and transferring pressure difference pn impulses resulting from fl ow to Q chamber offl ip-fl op. Control of pressure difference is effected by transferring controlled pressure difference impulses to chamber pr of fl ip-fl op. Regulator operates in accordance with selection of higher controlled value principle. Selected value shall cause resetting of slider (119) offl ip-fl op (04) and transmission of impulses, in that value, via impulse ducts (117) + and (118) -. To chambers of actuator (02); pressure + of controlled value above diaphragm (29), and pressure - under diaphragm. Transferred impulses in higher controlled value shall cause defl ection of diaphragm (29), movement of actuator (02) stem (37) and closure of valve plug (5), until controlled value reaches the value preset on packing gland (12) or spring (60) of adjuster (03). To ensure reliable operation it is critical that pressure difference values of packing gland pn is the same as controlled pressure difference pr. Regulator requires only impulse tubes for connection to controlled pressure difference. Total pressure drop in valve comprises pressure drop on packing gland and pressure drop on valve plug. 10 G 2 pr = p p = p p n n + ( ) Kv DIMENSIONS AND WEIGHTS DN 15 g = 10 G 2 ( ) Kv A B E H L [mm] Weight of valve (01) and flipflop [kg] 130 8, , , , , ,5 Weight [kg] Spring range C Actuator Adjuster (03) [kpa] [mm] (02) DN DN ,4 2, , ,2 3, ,4 5,0 6, Self-actuating differential pressure and fl ow regulators TYPE ZSN9

7 TECHNICAL SPECIFICATIONS K VS 1) [m 3 /h] MATERIALS as per PN DN Full flow 3, , Reduced flow 1 1,6 2,5 1,6 2,5 3,2 2,5 3, , Noise coefficient Z 0,65 0,6 0,55 0,45 0,4 0,35 Control characteristics Regulator ZSN 9.1 ZSN 9.2 VALVE (01) grey iron EN-GJL-250 Body spheroidal iron EN-GJS LT carbon steel GP240GH (1.0619) stainless steel GX5CrNiMo (1.4408) Plug and seat Guide sleeve X6CrNiMoTi (1.4571) Packings EPDM 3) ACTUATOR (02) Housing carbon steel S235JRG2C (1.0122) stainless steel X6CrNiTi (1.4541) Stem X17CrNi 16-2 (1.4057) Diaphragm EPDM + tpolyester fabric 3 ) Packing EPDM 3) Adjuster (03) Adjuster components carbon steel C45 (1.0503) Springs spring steel 60Si7 FLIP-FLOP (04) Flip-flop components X17CrNi 16-2 Packings EPDM 3) 3) other materials, subject to medium type. proportional Spring range (kpa) 2) Allowed pressure drop in valve [bar] 20 Minimum pressure drop in valve [bar] valve body in grey iron PN 16 Valve nominal pressure Maximum medium temperature ( o C) 1) other K vs ratios subjecto to order specifi cation. 2) other ranges subject to order specifi cation. valve body in spheroidal iron PN 16; PN 25; PN 40 valve body in carbon steel and stainless steel PN 16; PN 25; PN 40 water, steam 150 gases 80 NOMINAL PRESSURE, WORKING TEMPERATURE AND WORKING PRESSURE FLOW DIAGRAM FOR WATER Self-actuating differential pressure and fl ow regulators TYPE ZSN9 211

8 INSTALLATION Regulator is to be installed on horizontal pipeline. Medium fl ow direction is to conform to arrow on body. At medium temperature lower than 100 C regulator position is optional, at higher temperatures it is recommended to install regulator with adjuster unit (03) down. To ensure reliable operation of regulator apply strainer FS1 upstream. EXAMPLES OF APPLICATION Control p = p 1 -p 2 and reduction of V Supply-mounted Return mounted existing connections connections to be added (pipe 6 x1) ACCESSORIES existing connections connections to be added (pipe 6 x1) Delivered: Optional (ordered separately): - nut and cutting ring for impulse tube, - strainer FS1, - straight connection pipes 6 1, - elbow connection pipes 6 1, - connection stub NPT 1/4, - impulse tube 6 1, - adjustment wrench. ORDERING In your order specify regulator type and marking, ZSN9.1 or ZSN 9.2, DN nominal diameter, PN nominal pressure,fl ow ratio K vs, body material, spring range, closure type (only for tight executions). Example of order: ZSN 9.1 DN 50; PN 16; Kvs 32; spheroidal iron; [kpa], tight. 212 Revision: ZSN9/08/2007 Valid until the next revision.