与内部缠绕垫片完全连接的、更坚固、防泄漏的阀帽
STRONGER, LEAKPROOF BODY-BONNET JOINT FULLY ENCASED SPIRAL WOUND GASKET

　　衬垫的连接结构非常重要。在全封闭的空腔内能够更好的控制压缩性。此外，也排除了不锈钢缠绕金属退绕的可能性。
　　The design of the gasketed joint is critical. Its compression is
better controlled in a fully enclosed cavity. Also, the possibility of unwinding of the SS spiral metal is eliminated.

更坚固的螺栓确保连接的紧固性
STRONGER BOLTING ENSURES JOINT TIGHTNESS

　　在我们的实验室对缠绕垫片进行的简单应力和挠度试验对比试验再次证明泄漏的控制主要取决于衬垫座应力，而ASME标准第III节中显示的数据，即用于计算螺栓尺寸的支座系数 m = 3和支座应力 y = 10,000 psi是不充分的。我们的螺栓连接计算所采用的衬垫应力最小为16,000 psi，并以此作为防泄漏连接必不可少的标准。
　　Simple stress vs. deflection tests conducted on spiral wound gaskets in our laboratory confirmed that the control of leakage is highly dependent on gasket seating stress and that the values shown in the ASME Section III Code, namely the seating factor m = 3 and the seating stress y = 10,000 psi used in calculating bolt sizes, are highly insufficient. Our bolted joints are calculated to a minimum gasket stress of 16,000 psi which is essential for a leakproof joint.

螺纹旋进强度的焊接阀帽
（仅适用于特别订单的全渗透焊接）
THREADED-IN STRENGTH WELDED BONNETS
(Full-penetration welds on special orders only)

　　带有螺纹旋进强度的焊接阀座能够为短时排放提供更高水平的安全性能。阀体-阀帽的焊接工艺是采用完全自动化的MIG焊接设备进行的。焊接硬度控制在（包括热影响区域）200 HB以下。
　　Valves with threaded-in strength welded seats offer an additional level of safety against fugitive emissions. The body-bonnet welds are made on fully automatic MIG Welders. Weld hardness is controlled (including the heat-affected zone) and maintained below 200 HB.

自动化MIG焊接设备
Automatic MIG welder.

安全紧固的阀杆密封
SAFER AND TIGHTER STEM SEAL

• 阀杆经过硬化和研磨抛光。
  Stem hardened and ground.
• 每个垫圈都分别穿入并经过压紧以提供更好的紧固性。
  Each packing ring individually inserted and compressed for better tightness.
• 两件式自校正密封压盖。
  Two-piece self-aligning gland.
• 坚固的全螺纹防腐螺栓提供所需要的保压应力。
  Sturdy full-length threaded corrosion-resistant bolts provide the required high packing stress.
• 动负载选择。
  Live-loading optional.
• 正向后座：与整体后座相对的阀杆斜角。
  Positive backseat: stem bevel against integral backseat.

两件式阀杆驱动，可在线更换
TWO-PIECE STEM DRIVE RENEWABLE IN-LINE

　　只有Velan小型锻钢OS & Y闸阀具有这种独特而且轻便的特点。这种特点使得：
　　This exclusive and handy feature found only on Velan small forged OS & Y gate valves enables:

• 能够在线更换阀杆螺母。
  Replacement of stem nut in-line.
• 手轮可拆卸，不影响阀门的开关位置（关闭或开启）。
  Removal of handwheel without affecting the position of valve (closed or open).
• 更好的阀杆螺母润滑控制。
  Better stem nut lubrication control.

球形截流阀、针形阀和截止止回阀内的阀体导向阀瓣
有利于消除阀杆的侧面推力
BODY-GUIDED DISC IN GLOBE STOP,
NEEDLE AND STOP-CHECK VALVES ELIMINATES
SIDE THRUST ON STEM

　　顶部和底部导向的阀瓣确保阀座和阀瓣的精确对准不受高速流体所产生的侧面推力的影响。
　　The top- and bottom-guided disc assures perfect seat and disc alignment in spite of side thrust caused by high velocity flow.

　　这种结构避免阀杆刮伤和磨损，延长阀瓣密封和阀体的使用寿命。
　　This prevents stem from scoring and galling and provides longer disc seal and body life.

实心钨铬钴合金阀瓣 适用于所有钨铬钴合金阀内件 Solid Stellite disc for full Stellite trim

实心钨铬钴合金阀瓣 适用于所有Y型阀门 Solid Stellite disc for all Y-pattern valves

在活塞止回阀内的阀体导向阀瓣
BODY-GUIDED DISC IN PISTON-CHECK VALVES

• 即使在大流速下，也能够确保阀瓣和阀座的精确对准。
  Assures perfect alignment of disc and seat even at large flow velocities.
• 适用于中低压力的平面阀座表面。
  Flat seating faces for low and medium pressures.