+ S. {0 g% X" t * x& f2 `; o! f5 j" |在这里是阀座的意思,那么metal to metal seated 呢? 8 {1 _4 \, J# F; H5 y% v还有Back seating stems; Z' V2 V* H s7 q
6 @- [5 d s9 `; c: L[ 本帖最后由 卓信 于 2007-12-7 10:35 编辑 ]作者: 卓信 时间: 2007-12-7 10:38
metal to metal seated 就是金属件固定的意思 8 |& `; V; f# N1 V. l1 {# x& e( g7 ^6 a
Back seating stems 这个要结合你实际的阀体了,表面意思应该是 背面固定的支架作者: 望海的日子 时间: 2007-12-7 10:43
我从石油大典上没有查出来metal to metal seated g, ?9 Q" ~& Z$ m' e0 O
但是查处3 N) ^9 b) _) D3 m
metal to metal seal % P+ Z" ]4 b: u金属—金属密封圈 ; |# \ Q4 }2 f- b# z金属对金属密封 6 |# C9 s; L! n1 Z% s所以怀疑写错了作者: 伊凡 时间: 2007-12-12 17:42
断章取意, 见笑: " G3 O6 h5 I- e/ _ ]. _3 J- d8 ]" w6 F( @
metal to metal是钢对钢的意思,即接触面均为金属,而没有其他润滑材料做衬垫.作者: 伊凡 时间: 2007-12-12 17:50
上密封座设计 ; C( f3 ~, p+ j4 ^3 M. P8 y
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我公司提供的所有截止阀都有倒密封设计。通常情况下,碳钢截止阀的阀座设计采用分离式倒密封结构 ,不锈钢截止阀的倒密封是直接加工或者是焊后加工。当阀门在全开位置时,倒密封的密封面非常可靠。虽然按照标准 API 600中有倒密封,但这不作为在带压情况下更换填料的依据。 $ w2 u1 N: M. w' Z# O & s4 W: s' `3 j1 c3 M: H# VBack Seating Design 4 k4 t# [6 f9 g' D & D8 n" |) _( T9 b" I8 _All ur globe valves have the back seating design.ln most Cases,the carbon steel globe valve is fitted with a renewable back seat,For stainless steel globe valve,the back seat is machined directly in the bonnet or is machined after welding.When the globe valve is at fully open position,the sealing of the back seat can be very reliable.However,as per the requirement of API600,it is not a dvisable to add or change packing by the mean of back seating when the valve is pressure containing.作者: 伊凡 时间: 2007-12-12 17:53 标题: Stem = 阀杆 ·阀杆设计 - h8 i4 M: ^/ Z) ]$ \( a- x5 R; o7 {7 a# F, _
采用整体锻造工艺制成,按照标准要求确定最小直径。 2 ]& `% E2 n+ i' F- Q T+ H' ~$ P6 a+ P# D3 K" H
Stem Design * Q* |" V) i/ }
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The stem is of integral forged design,The minimum diameter of the stem shall per the standard requirement.