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(jù)歐洲標準,由意大利著名的阿托斯公司授權(quán),生產(chǎn)的液壓閥.調(diào)壓步驟
1、關(guān)閉減壓閥前的閘閥，開啟減壓閥后的閘閥，制造下游低壓環(huán)境；
2、將調(diào)節(jié)螺釘
按逆時針旋轉(zhuǎn)至最上位置（相對最di出口壓力），然后關(guān)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(zhuǎn)調(diào)節(jié)螺釘，將出口壓力調(diào)至所需要的壓力（以閥后表壓為準）；調(diào)整好后，將鎖緊
螺母鎖緊，打開減壓閥后閘閥；
5、如在調(diào)整時出口壓力高于設(shè)定壓力，須從第一步開始重新調(diào)整，即只能從低壓向高壓調(diào)。
主要作用
減壓閥的作用原理是靠閥內(nèi)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(cè)的進出口水壓差自動調(diào)節(jié)。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(cè)活塞面積比成反比。這種減壓閥工作平穩(wěn)無振動；閥體內(nèi)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(dǎo)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(jié)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(dǎo)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
