0000000016 00000 n Zc0&8(&iYH~Ho(%46h0uwK7EGGDDFG7FX{xULQ:+sV^]*uXXf8t\D@f=s6'~_`Oq8D]SINII\7n5ewrm\J`4\Z\)/>aQ1n3|?~c&2S@L uYY5YoOHrrsNy};_-cZuuk/\?k)*0-(/x)bSWr^$E[nEmnfmOk%%%JY1 ir]+wZiYYGgs{?T'UqioC*?=x^P 2mjTl,ixwxH&JGfac7sZr}wN>8(mP{nLGRHgT)S]]m?x3g]8wn|c\x'+=/_u=wvWO]c\n}'l:o\:xviMo~{;;y/Ylx~XHQc?:b=rf}Icda)iD)V|~W_}oD\-_w>~f~#zGPQc'O 0000029336 00000 n 0000001736 00000 n 0000026685 00000 n Dependable and durable service is assured with one-piece stem and stainless steel backed reinforced PFTE bearings. 0000003721 00000 n 0000098092 00000 n S|zfyq_0sxpqyv\7GSa8"Q>j1>s@7|8,e%9-$H*P *@#`l=p0VHiA>@ vjP@h'@8 .:n``a!2D UH2!y@PAB&*: :]B=h~L2 p"p\u6?g! DCJiA^&2L#PEGQ(j5jU:jGnFQ3Oh2Z mC#ltnC_BF`0FcDa1k0Vy f3bXl `{Cq[3yqww7Zx;| ]8~ M!8*B!HT'\b8 0000010612 00000 n 0000095238 00000 n Description. 0000032641 00000 n 0000076887 00000 n Jamesbury product and service offering | Valmet - Neles.com The following standard sizes are available: 815W (Class 150 Wafer-Body Design) 2-1/2"-30" (DN 65-750) Category: Butterfly Valves Tag: Remanufactured. 0000006569 00000 n bolting length Bolting should be in accordance with ASME B18.2.1 Hex nuts should be in accordance with ASME B18.2.2 (Heavy hex used for calculation) Bolting and hex nuts are Unified Coarse Thread Series (UNC) Class 2A (bolts) and Class 2B (hex nuts) per ASME B1.1 0000066883 00000 n 0000001327 00000 n 1 0 obj xb*W#JIl. Butterfly Valve Bolt Gasket Selection Chart 12/11/09 Milwaukee and Jamesbury Bolt Chart 120909. xwTTwz0)C 7Da`(34!EDA"""` `QQy3Vtg}k=g} tX 136 0 obj <> endobj 188 0 obj<>stream 0000094771 00000 n hA m-pG 4[zx. %%EOF 3. Polymer & elastomer chemical resistance chart for high-performance Jamesbury ball and butterfly valves Language options: EN. 0000100934 00000 n 0000036093 00000 n 0000015670 00000 n 0000018861 00000 n 0000076565 00000 n 0000001425 00000 n 0000119485 00000 n endstream recommended for use on Jamesbury ball and butterfly valves. 0000003939 00000 n 0000018210 00000 n <]>> 0000003827 00000 n ZYphH\``u6m DZF@h\%*Xa@ 'F 0000027860 00000 n Wafer-Sphere, High Performance Butterfly Valves - Ferguson SEAT SEAT When the valve is shut, the disc slightly deflects the seat. Flow information for Jamesbury ball and butterfly valves Language options: EN. 0000002394 00000 n 0 0000002410 00000 n startxref 0000022100 00000 n Consult factory for 3" and smaller valves when using ASME B16.1 flanges. NOTE . 0000029555 00000 n 0000100445 00000 n (7ri[G Jamesbury Series 800 Butterfly Valve | Valin 0000044063 00000 n PDF Series 815 ASME Class 150 and series 830 ASME Class 300 Jamesbury 0000003344 00000 n The Jamesbury Wafer-Sphere design depicted below incorporates fully adjustable packing (Shaft Seal) to ensure a long life with no external leaks. 2) Lengths shown are maximum allowable; all others are minimum allowable. vH 1-1/2"-6NC. ball and butterfly valves, Jamebury Wafer-Sphere 300 Jamesbury Wafer-Sphere high performance butterfly valves Jamesbury Wafer-Sphere high-performance butterfly valves provide long-lasting tight shutoff capability, excellent flow characteristics, and long service life. For the sake of convenience, and where lever handles present space problems, gear actuators are the ideal choice. " PDF Series 815 Ansi Class 150 and Series 830 Ansi Class 300 Wafer-sphere 0000077449 00000 n Materials: Carbon steel, Stainless steel, Monel, Hastelloy C, and custom materials. Jamesbury Wafer-Sphere butterfly valve series K815W, K815L, K830W & K830L model A cryogenic, class 150 & 300 3" - 12" (DN 80 - 300) Language options: EN Code: IMO-304 (EN) 0000080754 00000 n Jamesbury ball and butterfly valves, Recommended fasteners %PDF-1.5 % 0 The technical data herein is for general information only . NIBCO Butterfly Valves with Rubber Seats www.nibco.com GD4700 Series LD1000/2000/7000/8000 Series LD/WD2000/3000/5000 Series LC/WC2000 Series LD/WD3500 Series . %^`K66^DO;K8Mpg#2PeP,e{(/[}M4! 1(OG+ ' 6,E'h$6nrXW]P7%v1uiN|tqiBx*H4Ff]WY3LiYV4hbLv[D . % Jamesbury High Performance Butterfly and Ball Valves 815 Butterfly Valve 830 Butterfly Valve Flanged Ball Valve 3-Way Flanged Ball Valve 8000 Series Obsolescence Program 815/830 Series Drop In Replacement - Improved Seal Design - Lower Torque Values - Easier Maintenance 8000 Soft Goods Repair Kit - Includes the seat, shaft seals, and . 0000018349 00000 n 0000011350 00000 n 0000102192 00000 n PDF Valve Distributor - Industrial Pipe, Valve & Fittings Distributors 0000017612 00000 n 0000112273 00000 n m)EA&?5h8i e'@:^ xref PDF Series 815 Ansi Class 150 and Series 830 Asme Class 300 Wafer-sphere Installation, Maintenance and Operating instructions. 1HC= RCjl _+4 x6@N2z&JgBbWQk{%(| IwQw(mUi*=V%b.aIg{y(&u?:lt/j $"et4 9{hM*@UKZm0Gq'TpPoY0pNKPOw9rbm9+x#;Yyo fx#68VXj;]lEQf'M2-''b?e[HX~G1T} z|r}->o(2w)h7Pbe0FyH@@`I^ZH_15f@U 0000037648 00000 n Maximum Temperature: 260 C / 500 F. Presure Rating: ANSI Class 150, 300 & 600; also 6.9 bar /100 psi process rated model. 0000102726 00000 n How to Use and Interpret a Butterfly Valve Bolt Chart 0000017822 00000 n " Installation, Maintenance and Operating instructions | Neles materials of construction for Butterfly valves | Valmet - Neles.com 0000002741 00000 n 0000053118 00000 n % 1) Bolt lengths are calculated without flat washers, lock washers, envelope gaskets, spacers, or full face reinforing rings. 0000026886 00000 n ' Jamesbury brand valves have always been recognized leaders in valve technology. (WCHUj%9)#[%:bL trailer <]/Prev 594630>> startxref 0 %%EOF 214 0 obj <>stream M_^ZPx^]:6q.bN1n3It%2 2s}x_%&aAjp{yYH`/Bu'8SHoq,^HRiZO^#@O1!;p./H|pq!r@ {LgY#=8*e,oX Neles Easyflow JA series concentric disc resilient seated butterfly valves are suitable for a wide range of applications in manual or automated on/off through throttling control services. 0000114196 00000 n 0000095880 00000 n Jamesbury Commercial brochures; Technical bulletins; Installation, Maintenance and Operating instructions. Butterfly Valves. 0000008628 00000 n endstream 0000002551 00000 n Class 150 Jamesbury Wafer-Sphere high-performance butterfly valves Series 835 process-rated ASME Class 150 high-performance Wafer-Sphere butterfly valves are an excellent cost-effective alternative for shutoff pressures up to 100 psi (6.9 bar). 0000063617 00000 n 0000018756 00000 n :VChm{/d`N6 S|zfyq_0sxpqyv\7GSa8"Q>j1>s@7|8,e%9-$H*P *@#`l=p0VHiA>@ vjP@h'@8 .:n``a!2D UH2!y@PAB&*: :]B=h~L2 p"p\u6?g! DCJiA^&2L#PEGQ(j5jU:jGnFQ3Oh2Z mC#ltnC_BF`0FcDa1k0Vy f3bXl `{Cq[3yqww7Zx;| ]8~ M!8*B!HT'\b8 PDF Jamesbury MGR series manual gear actuators - Duncan Co 0 0000000016 00000 n Jamesbury Series 815 & 830 Butterfly Control Valve and butterfly valves, Polymer & elastomer chemical 0000035900 00000 n Next generation versatile butterfly valves. dv :@Z2ac.\.9ft*O)LD9p_k_,p+h BB. 0000001684 00000 n w/.^7,5vPW$\Y.hTpAl@-(XX=64|1XC"k$b3XXXXsE% yOg-"g-aM`-Hs:ky>k k5=k 0000101459 00000 n 0000003081 00000 n 0000095209 00000 n 0000100125 00000 n Class VI allows the least leakage.Wafer-Sphere High Performance Butterfly Valves are bubble-tight, MSS-SP61, which would exceed Class VI requirements. PDF Resilient Seated Butterfly Valves 0000002807 00000 n 0000002274 00000 n Tight, long-lasting sealing, and yet light and low-cost design makes it a good alternative to gate valves and other heavier rotary-type designs. Jamesbury Wafer-Sphere Series 860 ASME Class 600 high-performance butterfly valves provide long-lasting tight shutoff capability, excellent flow characteristics, and long service life. 0000063546 00000 n The Series 835 provides the same long-lasting tight shutoff capability, excellent 0000034346 00000 n Polymer & elastomer chemical resistance chart for high-performance Jamesbury ball and butterfly valves Language options: EN. hWr63Xe-Q.n]?Pl1H;_K>t8..s@rB BU$"!HDqIDE-#1q}#S$\|)"pL4$2 oB7I. Jamesbury Wafer-Spherehigh-performance butterfly valves provide long-lasting tight shutoff capability, excellent flow characteristics, and long service life. 0000018655 00000 n 15 0 obj <> endobj butterfly valve bolt chart - Buttetfly valve price 8)/0s> "a`oNwDz*kU)8'iNYT&oj *{Ov{6^O;[Is]Q\2SrL\c8I`ZJv92*f5rkiH[sH \otGz&)1[O@(lO]2qiuw- -Dp4:X5{!T'f Yb=$;(uwa"T#Jtn;!?{AP?2Jlax>! The new generation of Neldisc metal-seated and Wafer-Sphere soft-seated butterfly valves is built to deliver sustainable performance today and tomorrow. 0000001408 00000 n 0000007857 00000 n 0000029110 00000 n 15 32 MGR Series actuators . [-O$LIAlv@c3!7^_{6_W?_x !^ TzB0Bi)~aci~%g:x} 0000101560 00000 n ? 0000112244 00000 n a`{g0 g? 0000008378 00000 n 0000004445 00000 n nwW*Wnnk^;sg)O =v'gPkwCO}e~eU 0000062428 00000 n 0000004238 00000 n 0000114298 00000 n 0000094487 00000 n 0000026474 00000 n 0000113130 00000 n 0000026158 00000 n 5.75 / 3.75. Technical bulletins. OO36ioYn|D5Dr&PHT?2W^^)$W)B]H c>0PA{S>hX\^ ~`Y2=mh`#aUYe>(i ~VG; 0000117815 00000 n %PDF-1.4 % endobj j+mkjj?1BQ=3r/ $*@t# 0000063699 00000 n Lengths are based on the minimum flange thickness of weld neck flanges per ANSI B16.5 and use of standard 1/16" gaskets. 0000020721 00000 n 0000044291 00000 n for Jamesbury brand products, Flow information for Jamesbury 0000100645 00000 n Butterfly valves can be either symmetric or eccentric (=offset), the latter referring to the stem being displaced from the center of the disc. high performance butterfly valve seat materials, Ensuring seat and stem sealing PDF Flange Bolting Guide for Figure Hp Butterfly Valves - Fnw 0000020748 00000 n 0000112803 00000 n !CiKtsvuKv,\V6u2z1KqL4 miyA]b&mSvjS. 'Adobe Photoshop Elements 15.0 (Windows) 2017:10:09 11:06:26 * 2( : H H Adobe_CM Adobe d 0000050802 00000 n %%EOF 0000081422 00000 n 0000053332 00000 n 0000009005 00000 n QZtHOiVYEK9CyEiJJY)U*WB3,Jgjujj:[i4 3Z$=ZZs:[;'uu|ttuutW1Rk`k~AC!pdbel4jL37.00~aimii33_.Y5,-:-^ZXr,XXXmhmcng32+h[WmY Nfodb~rRcL:GcA'5'Sg gsK1|697;nw/b~====gxF{yQa4#U=w.Z[}w> hb```f``f`g`` Bl@Q&&fsbvp1 s$I6i]rmD. 0000044521 00000 n Should a leak develop over time, the valve has a packing follower that is fully adjustable. 3 !1AQa"q2B#$Rb34rC%Scs5&DTdEt6UeuF'Vfv7GWgw 5 !1AQaq"2B#R3$brCScs4%&5DTdEU6teuFVfv'7GWgw ? 0000003023 00000 n Jamesbury Series 800 Butterfly Valve Specifications. Note: Cap screws must be short enough to ensure that they do not touch each other after tightening to avoid . PDF 177722 MV Butterfly Valve Catalog 10-19-22 - Milwaukee Valve 0000062712 00000 n 0000034411 00000 n 0000008103 00000 n 0000102088 00000 n 0000030063 00000 n NOTE: The FNW figure HP high performance butterfly valves are designed to fit between ANSI B16.5 class 150 flanges. 0000035988 00000 n Flange Bolt Tabulation for Butterfly Valves - Media Valve Co., Inc. 4Jc `23B=H>nL"7w+ 7tIdP}F1(1E";cX|v[="%qQ-["LqEVaf"+I"&BD )+Rn|nb2T@`d0l[zZ?KF\[fFf_nM{H?}_z= YQmv|c3 4 )[W%I 316rX7( 0000113603 00000 n 3 opl&&x}QX%72@ 4Jc `23B=H>nL"7w+ 7tIdP}F1(1E";cX|v[="%qQ-["LqEVaf"+I"&BD )+Rn|nb2T@`d0l[zZ?KF\[fFf_nM{H?}_z= YQmv|c3 4 )[W%I 316rX7( Our high performance butterfly valves are available in sizes ranging from 2-1/2 to 24 for class 150 ratings, and 2-1/2 to 16 for class 300. %PDF-1.5 % 0000030007 00000 n endstream endobj 70 0 obj <> endobj 71 0 obj <> endobj 72 0 obj <>stream ^&]VT%yEg jzfk/-ay&L{;h z{>?QWeQSe[i.Y[*kVRzoTOVeTp5h3kz_JyD\kZ^'ljzn,mc]/Ff(+k,7g;k-u]Ex{E'{~M._ Y9 x; k6gOw,w_"Pmp. 0000077367 00000 n 0000030117 00000 n endstream endobj 1050 0 obj <>/Filter/FlateDecode/Index[14 983]/Length 49/Size 997/Type/XRef/W[1 1 1]>>stream Legal notice | PDF Series 835 process-rated Class 150 Jamesbury Wafer-Sphere high Jamesbury polymeric seated ball They provide long-lasting tightness and industry-leading valve reliability, certified to SIL 3. 0000114950 00000 n nwW*Wnnk^;sg)O =v'gPkwCO}e~eU 0000003354 00000 n 0000093490 00000 n 'Adobe Photoshop Elements 15.0 (Windows) 2017:10:09 11:06:26 * 2( : H H Adobe_CM Adobe d General technical data | Neles 0000029719 00000 n A butterfly valve is a rotary valve (quarter turn valve) using a disc as the closure member. Jamesbury Wafer-Sphere butterfly valve, series 800, Enabling a circular economy for our customers, Supplier sustainability engagement program, Pulper feed system and dewiring equipment, Maintenance development and outsourcing services, Paper machine clothing and filter fabrics, Tissue machine clothing and filter fabrics, Automation for the (petro-)chemical industry, Clothing/padding for chest ironers and presses, Maintenance development and outsourcing services, Empowering people to perform at their best, Maintenance planning and lifecycle services. Our versatile product range includes both metal-seated butterfly valves and soft-seated butterfly valves. NOTE . After proper operation is verified, tighten the bolts to the minimum recommended bolt torques listed in Table 3 below using a cross-over pattern, also shown below in Figure 3. 0000004504 00000 n %PDF-1.4 % Code: T120-1 (EN) Issue: 5/ . startxref Although compact and lightweight, the JA series is designed to be rugged, reliable, and to comply with a variety of global industry standards. PDF Installation and Maintenance Guide for NIBCO Butterfly Valves with 3 !1AQa"q2B#$Rb34rC%Scs5&DTdEt6UeuF'Vfv7GWgw 5 !1AQaq"2B#R3$brCScs4%&5DTdEU6teuFVfv'7GWgw ? %PDF-1.4 Product suitability should be based solely upon customers detailed knowledge and experience with their application . cracking the lug. <>stream 0000080452 00000 n Jamesbury Wafer-Sphere high-performance butterfly valves combine unique off-center disc, proprietary seat design and Xtreme sealing technology. xref Code: IMO-319 (EN) Issue: 4/2022 Jamesbury Wafer-Sphere Butterfly valve model C 3" - 12" (DN80 - 300) class 600 Language options: EN. !-u6b7w(oKW=GuvER~~v*_m[{\ )4S+_eu[tu::WM)-k!lKNHr ix}h9gzR:SGUUvVfwGGTEUKj'6R/}}{SVK 3-_/9b k?Gw9%gNKN; J5uU{_[kEAMc;w. 0000003053 00000 n 0000067274 00000 n 0000020927 00000 n 0000080462 00000 n Jamesbury Wafer-Sphere butterfly valve series K815W, K815L, K830W, K830L, K860W, & K860L class 150, 300 and 600 Language options: EN. 0000022667 00000 n [s{. Posters. Studs & Bolts for Mounting Butterfly Valves 2" to 24" Between ANSI After proper operation is verified, tighten the bolts to the minimum recommended bolt torques listed in Table 3 below using a cross-over pattern, also shown below in Figure 3. Code . 0000000936 00000 n High performance Jamesbury butterfly valves The combination of a unique off-center disc, proprietary seat design, Xtreme sealing technology, and other features make our Wafer-Sphere high-performance butterfly valve a tight-sealing, long-lasting, yet lighter and lower-cost alternative to gate valves and other heavier rotary-type designs. The use of machine bolts to install butterfly valves between flanges is not recommended. :_e_ .SPt?)ba$::mAg=ZgTzR,z|M3:A4~-5H|ww{!!X?hgv NkMYQ:{`$gbtfainJ& ePU|H/Gy375c. Reviews (0) Jamesbury Wafer-Sphere high-performance butterfly valves provide long-lasting tight shutoff capability, excellent flow characteristics, and long service life. fcxnsp4|C'XOhQ6e)?jrghPVZ ? g$Pn.B&5zv."f%` |z@X!d3/ ? Butterfly Valve | Belimo Commercial brochures. 0000035380 00000 n 0000038116 00000 n % 0000018453 00000 n 0000036351 00000 n Milwaukee Valve offers butterfly valves for all applications. 0000053900 00000 n %PDF-1.4 Machine bolt length and flange thickness tolerance variations could result in "bottoming out"of the bolt before full gasket compression, or insufficient thread engagement. 0000003073 00000 n The TFE Lined SS Bearings (Upper and Lower Shaft . The chart shows the size and weight of the bolts, as well as the compatibility of each bolt for use in various applications. 0000002032 00000 n 0000002979 00000 n 0000019005 00000 n 0000102845 00000 n 0000044407 00000 n PDF Recommended Fasteners for Wafer-sphere Butterfly Valves Code: T101-3 (EN) Issue: 5/2022 Recommended fasteners for Jamesbury Wafer-Sphere butterfly valves . stream 0000111818 00000 n butterfly valve bolt chart DIN flange and bolt DN In PN10 PN16 OD PCD Bolt and length Flange thickness OD [] 0000032091 00000 n 0000003140 00000 n Tight, long-lasting sealing, and yet light and low-cost design makes it a good alternative to gate valves and other heavier rotary-type designs. Flow information for Jamesbury ball and butterfly valves Language options: EN. 0000040183 00000 n butterfly valve bolt chart is a graphical representation of the different types of bolts that can be used with a specific type of lug butterfly valve. ;)E_sje:.KOi'/#idP3ucGhUix}&HF#y7WlLK 'IrFo:(U`M-IG&]=717R6{#i9@'2zK,|"\7bmfMZ+6bm^w7tl QS&:y}Vig@J5|=&qMY0s0XhmWR32Vz.FvVdQ.Nix% 0000098476 00000 n 0000020550 00000 n resistance chart for high-performance Installation, Maintenance and Operating instructions | Neles 0000063079 00000 n 0000063050 00000 n %%EOF 0000004668 00000 n 0000082458 00000 n M"y6H RX=F1V}DZ`| R. +`4' U 0000050153 00000 n Standards: Meets ISO-15848 and other emissions . 0000004312 00000 n hbbd```b`` d_ 0000113666 00000 n The assemblies are available with NEMA 2 or 4X housing and offer a range of Cv values to provide an economical control valve solution for large high flow applications. 0000011453 00000 n 2022, Technical information recommended 0000095809 00000 n This experience allows us to provide a butterfly valve that can lower your costs without risking performance. Valve Distributor - Industrial Pipe, Valve & Fittings Distributors . butterfly valves, Approvals, acceptances and listings 0000002880 00000 n 0000009307 00000 n Cap Screws Machine Bolts Stud Bolts. This information helps to ensure that the right bolts are chosen for . Bolt lengths may vary due to manufacturing tolerances in valves, gaskets, flange bolts and flanges. 0000036780 00000 n PDF Butterfly Valve - Duncan Co Zc0&8(&iYH~Ho(%46h0uwK7EGGDDFG7FX{xULQ:+sV^]*uXXf8t\D@f=s6'~_`Oq8D]SINII\7n5ewrm\J`4\Z\)/>aQ1n3|?~c&2S@L uYY5YoOHrrsNy};_-cZuuk/\?k)*0-(/x)bSWr^$E[nEmnfmOk%%%JY1 ir]+wZiYYGgs{?T'UqioC*?=x^P 2mjTl,ixwxH&JGfac7sZr}wN>8(mP{nLGRHgT)S]]m?x3g]8wn|c\x'+=/_u=wvWO]c\n}'l:o\:xviMo~{;;y/Ylx~XHQc?:b=rf}Icda)iD)V|~W_}oD\-_w>~f~#zGPQc'O 0000002942 00000 n 0000029310 00000 n 0000044592 00000 n endstream endobj startxref 0000033373 00000 n Butterfly Valves | Neles of Jamesbury Wafer-Sphere high performance butterfly valves, 3" - 14" (DN 80 - 350) Series 815W and 815L, Model A & B, 3" - 12" (DN 80 - 300) Series 830W, 830L, 860W, 860L, Model A. The following designs are available in sizes 3" - 24" (DN 80 - 600): 860W (Class 600 Wafer-Body Design) 860L (Class 600 Single-Flange Design) endstream endobj 16 0 obj <. 0000114475 00000 n 0000021784 00000 n General technical data | Neles 43(CzW7zshHS6T%%ip`oQUHo74,A6%;J}0"DEq$xrUQBMtd*|KMl=Nh+.j;|c-~6`*!ybXAMz{G!Rbu^L8S^WrZlL@#@"iP?^?PrkpOE>K`s+bBrq&(w e[`8^"fudGFe>gj>&O1FOlE7R)T4Ovo`M[+ZOy e o[\SUl]oln&$Y%*RV{knkSHB-sogO+n Gy#qN\N"_!gb84+*t Dke\ Wafer body valve using Heavy Hex Machine bolts with 1 Heavy Hex nut each . NIBCO Butterfly Valves with Rubber Seats www.nibco.com GD4700 Series LD1000/2000/7000/8000 Series LD/WD2000/3000/5000 Series LC/WC2000 Series LD/WD3500 Series . k Zt"|&?|AB>0i6PN>${;cXnH\DUGZn4.&}yR l*sn4B6WTZ)0:oZ;`9~[nm trailer 0000005281 00000 n 0000077296 00000 n 0000099654 00000 n <>stream Jamesbury Wafer-Sphere high-performance butterfly valves combine unique off-center disc, proprietary seat design and Xtreme sealing technology. 0000008205 00000 n 0000095962 00000 n 0000041156 00000 n "I))p"`5` Dif/yD 0000003730 00000 n