威托WATO 是意大利ATOS阿托斯的子品牌，是ATOS新注冊的品牌.它根據歐洲標準,由意大利著名的阿托斯公司授權,生產的液壓閥.調壓步驟
1、關閉減壓閥前的閘閥，開啟減壓閥后的閘閥，制造下游低壓環境；
2、將調節螺釘
按逆時針旋轉至最上位置（相對最di出口壓力），然后關閉減壓閥后閘閥；
3、慢慢開啟減壓閥前的閘閥至全開；
4、順時針慢慢旋轉調節螺釘，將出口壓力調至所需要的壓力（以閥后表壓為準）；調整好后，將鎖緊
螺母鎖緊，打開減壓閥后閘閥；
5、如在調整時出口壓力高于設定壓力，須從第一步開始重新調整，即只能從低壓向高壓調。
主要作用
減壓閥的作用原理是靠閥內流道對水流的局部阻力降低水壓，水壓降的范圍由連接閥瓣的薄膜或活塞兩側的進出口水壓差自動調節。定比減壓原理是利用閥體中浮動活塞的水壓比控制，進出口端減壓比與進出口側活塞面積比成反比。這種減壓閥工作平穩無振動；閥體內無彈簧，故無彈簧銹蝕、金屬疲勞失效之慮；密封性能良好不滲漏，因而既減動壓（水流動時）又減靜壓（流量為0時）；特別是在減壓的同時不影響水流量。
常用型號如下：
WATO WGAM型先導式溢流閥
WGAM-10/10/100 WGAM-10/10/210 WGAM-10/10/350 WGAM-10/11/100 WGAM-10/11/210 WGAM-10/11/350 WGAM-20/10/100 WGAM-20/10/210 WGAM-20/10/350 WGAM-20/11/100 WGAM-20/11/210 WGAM-20/11/350 WGAM-32/10/100 WGAM-32/10/210 WGAM-32/10/350 WGAM-32/11/100 WGAM-32/11/210 WGAM-32/11/350 WGAM-10/P/100 WGAM-10/P/210 WGAM-10/P/350 WGAM-20/P/100 WGAM-20/P/210 WGAM-20/P/350
WATO WGIR，WGIU型壓力控制閥
WGIU-10/10/50 WGIU-10/10/100 WGIU-10/10/210 WGIU-10/11/50 WGIU-10/11/100 WGIU-10/11/210 WGIR-10/10/50 WGIR-10/10/100 WGIRR-10/10/210 WGIR-10/11/50 WGIR-10/11/100 WGIRR-10/11/210
WATO WQV-06型流量控制閥
WQV-06/1 WQV-06/6/V WQV-06/11 WQV-06/16 WQV-06/24/V
WATO WDP型單向閥
WDR-06/4 WDR-10/4 WDR-15/4 WDR-25/4 WDR-06 WDR-10 WDR-15 WDR-25
WATO WHMP，WKM型疊加式溢流閥
WHMP-011/50 WHMP-012/50 WHMP-013/50 WHMP-014/50 WHMP-015/50 WHMP-011/100 WHMP-012/100 WHMP-013/100 WHMP-014/100 WHMP-015/100 WHMP-011/210 WHMP-012/210 WHMP-013/210 WHMP-014/210 WHMP-015/210 WHMP-011/350 WHMP-012/350 WHMP-013/350 WHMP-014/350 WHMP-015/350 WKM-011/50 WKM -012/50 WKM-013/50 WKM-014/50 WKM-015/50 WKM-011/100 WKM-012/100 WKM-013/100 WKM-014/100 WKM-015/100 WKM-011/210 WKM-012/210 WKM-013/210 WKM-014/210 WKM-015/210 WKM-011/350 WKM-012/350 WKM-013/350 WKM-014/350 WKM-015/350
WATO WHG，WKG型疊加式減壓閥
WHG-031/32 WHG-031/50 WHG-031/75 WHG-031/100 WHG-031/210 WHG-033/32 WHG-033/50 WHG-033/75 WHG-033/100 WHG-033/210 WHG-034/32 WHG-034/50 WHG-034/75 WHG-034/100 WHG-034/210 WKG-031/100 WKG-031/210 WKG-033/100 WKG-033/210 WKG-034/100 WKG-034/210
WATO WHQ，WKQ，WJPQ型疊加式單向節流閥
WHQ-012 WHQ-013 WHQ-014 WHQ-022 WHQ-023 WKQ-024 WKQ-012 WKQ-013 WKQ-014 WKQ-022 WKQ-023 WKQ-024 WJPQ-212 WJPQ-213 WJPQ-214 WJPQ-222 WJPQ-223 WJPQ-224
WATO WHR，WKR WJPR型疊加式單向閥
WHR-011 WHR-011/2 WHR-011/4 WHR-011/8 WHR-016 WHR-016/2 WHR-016/4 WHR-016/8 WHR-012 WHR-012/2 WHR-012/4 WHR-0128 WHR-013 WHR-013/2 WHR-013/4 WHR-013/8 WHR-011 WHR-014/2 WHR-014/4 WHR-014/8 WKR-011 WKR-011/2 WKR-011/4 WKR-011/8 WKR-016 WKR-016/2 WKR-016/4 WKR-016/8 WKR-012 WKR-012/2 WKR-012/4 WKR-0128 WKR-013 WKR-013/2 WKR-013/4 WKR-013/8 WKR-011 WKR-014/2 WKR-014/4 WKR-014/8 WJPR-011 WJPR-011/2 WJPR-011/4 WJPR-011/8 WJPR-016 WJPR-016/2 WJPR-016/4 WJPR-016/8 WJPR-012 WJPR-012/2 WJPR-012/4 WJPR-0128 WJPR-013 WJPR-013/2 WJPR-013/4 WJPR-013/8 WJPR-011 WJPR-014/2 WJPR-014/4 WJPR-014/8
WATO WDHE型6通徑電磁方向控制閥
WDHE-0610 WDHE-0611 WDHE-0612 WDHE-0613 WDHE-0614 WDHE-0615 WDHE-0616 WDHE-0717 WDHE-0618/A WDHE-06119 WDHE-06139 WDHE-06158 WDHE-06191 WDHE-06193/A WDHE-0630 WDHE-0631/2A-220AC WDHE-0631/2/A/24DC WDHE-0632 WDHE-0633 WDHE-0634 WDHE-0635/A WDHE-0636 WDHE-0717 WDHE-0638 WDHE-06319 WDHE-06339 WDHE-06358 WDHE-06391 WDHE-06393 WDHE-0670 WDHE-0671 WDHE-0672 WDHE-0673 WDHE-0674 WDHE-0675 WDHE-0676 WDHE-0677 WDHE-0678 WDHE-06719 WDHE-06739 WDHE-06758 WDHE-06791 WDHE-06793/A WDHE-0710 WDHE-0711-24DC WDHE-0711-220AC WDHE-0712 WDHE-0713-220AC WDHE-0713-24DC WDHE-0714 WDHE-0715 WDHE-0716 WDHE-0717 WDHE-0718 WDHE-07119 WDHE-07139/A WDHE-07158 WDHE-07191 WDHE-07193 WDHE-0750 WDHE-0751/A WDHE-0752 WDHE-0753 WDHE-0754 WDHE-0755 WDHE-0756 WDHE-0717/A WDHE-0758 WDHE-07519 WDHE-07539 WDHE-07558 WDHE-07591 WDHE-07593
WATO WDKE型10通徑電磁方向控制閥
WDKE-1610 WDKE-1611 WDKE-1612 WDKE-1613 WDKE-1614 WDKE-1615 WDKE-1616 WDKE-1717 WDKE-1618/A WDKE-16119 WDKE-16139 WDKE-16158 WDKE-16191 WDKE-16193/A WDKE-1630 WDKE-1631/2A-220AC WDKE-1631/2/A/24DC WDKE-1632 WDKE-1633 WDKE-1634 WDKE-1635/A WDKE-1636 WDKE-1717 WDKE-1638 WDKE-16319 WDKE-16339 WDKE-16358 WDKE-16391 WDKE-16393 WDKE-1670 WDKE-1671 WDKE-1672 WDKE-1673 WDKE-1674 WDKE-1675 WDKE-1676 WDKE-1677 WDKE-1678 WDKE-16719 WDKE-16739 WDKE-16758 WDKE-16791 WDKE-16793/A WDKE-1710 WDKE-1711-24DC WDKE-1711-220AC WDKE-1712 WDKE-1713-220AC WDKE-1713-24DC WDKE-1714 WDKE-1715 WDKE-1716 WDKE-1717 WDKE-1718 WDKE-17119 WDKE-17139/A WDKE-17158 WDKE-17191 WDKE-17193 WDKE-1750 WDKE-1751/A WDKE-1752 WDKE-1753 WDKE-1754 WDKE-1755 WDKE-1756 WDKE-1717/A WDKE-1758 WDKE-17519 WDKE-17539 WDKE-17558 WDKE-17591 WDKE-17593
WATO WDPHE型先導式樣電液換向閥
WDPHE-2610 WDPHE-2611 WDPHE-2612 WDPHE-2613 WDPHE-2614 WDPHE-2615 WDPHE-2616 WDPHE-2717 WDPHE-26119 WDPHE-26139 WDPHE-26158 WDPHE-26191 WDPHE-26193/A WDPHE-2630 WDPHE-2631/2A-220AC WDPHE-2631/2/A/24DC WDPHE-2632 WDPHE-2633 WDPHE-2634 WDPHE-2635/A WDPHE-2636 WDPHE-2717 WDPHE-26319 WDPHE-26339 WDPHE-26358 WDPHE-26391 WDPHE-26393 WDPHE-2670 WDPHE-2671 WDPHE-2672 WDPHE-2673 WDPHE-2674 WDPHE-2675 WDPHE-2676 WDPHE-2677 WDPHE-26719 WDPHE-26739 WDPHE-26758 WDPHE-26791 WDPHE-26793/A WDPHE-2710 WDPHE-2711-24DC WDPHE-2711-220AC WDPHE-2712 WDPHE-2713-220AC WDPHE-2713-24DC WDPHE-2714 WDPHE-2715 WDPHE-2716 WDPHE-2717 WDPHE-27119 WDPHE-27139/A WDPHE-27158 WDPHE-27191 WDPHE-27193 WDPHE-2750 WDPHE-2751/A WDPHE-2752 WDPHE-2753 WDPHE-2754 WDPHE-2755 WDPHE-2756 WDPHE-2717/A WDPHE-2758 WDPHE-27519 WDPHE-27539 WDPHE-27558 WDPHE-27591 WDPHE-27593 WDPHE-3610 WDPHE-3611 WDPHE-3612 WDPHE-3613 WDPHE-3614 WDPHE-3615 WDPHE-3616 WDPHE-3717 WDPHE-36119 WDPHE-36139 WDPHE-36158 WDPHE-36191 WDPHE-36193/A WDPHE-3630 WDPHE-3631/2A-220AC WDPHE-3631/2/A/24DC WDPHE-3632 WDPHE-3633 WDPHE-3634 WDPHE-3635/A WDPHE-3636 WDPHE-3717 WDPHE-36319 WDPHE-36339 WDPHE-36358 WDPHE-36391 WDPHE-36393 WDPHE-3670 WDPHE-3671 WDPHE-3672 WDPHE-3673 WDPHE-3674 WDPHE-3675 WDPHE-3676 WDPHE-3677 WDPHE-36719 WDPHE-36739 WDPHE-36758 WDPHE-36791 WDPHE-36793/A WDPHE-3710 WDPHE-3711-24DC WDPHE-3711-220AC WDPHE-3712 WDPHE-3713-220AC WDPHE-3713-24DC WDPHE-3714 WDPHE-3715 WDPHE-3716 WDPHE-3717 WDPHE-37119 WDPHE-37139/A WDPHE-37158 WDPHE-37191 WDPHE-37193 WDPHE-3750 WDPHE-3751/A WDPHE-3752 WDPHE-3753 WDPHE-3754 WDPHE-3755 WDPHE-3756 WDPHE-3717/A WDPHE-3758 WDPHE-37519 WDPHE-37539 WDPHE-37558 WDPHE-37591 WDPHE-37593 WDP-2713/D-24DC WDP-3713/D-24DC WDP-2713/D-220AC WDP-3713/D-220AC
WATO NHE型片式換向閥
NHE-0611 NHE-0611A NHE-0631/2 NHE-0631/2/A NHE-0613 NHE-0613/A NHE-0711 NHE-0713 NHE-0611/MV NHE-0611/AMW NHE-0631/2/MV NHE-0631/AMV NHE-0613/MV NHE-0613/AMV NHE-0711/MV NHE-0713/MV
WATO WDP型16通徑和25通徑液控方向閥
WDP-240 WDP-340 WDP-250 WDP-350 WDP-241 WDP-341 WDP-251 WDP-351 WDP-243 WDP-343 WDP-253 WDP-353 WDP-247 WDP-347 WDP-257 WDP-357 WDP-2401/2 WDP-2410/H WDP-3533/S
WATO WMAP型壓力繼電器
WMAP-40 WMAP-80 WMAP-160 WMAP-210 WMAP-320 WMAP-40/06 WMAP-80/06 WMAP-160/06 WMAP-210/06 WMAP-320/06 WMAP-40/10 WMAP-80/10 WMAP-160/10 WMAP-210/10 WMAP-320/10
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