PQ340H, PQ340Y, PQ340F 侧装偏心半球阀
The PQ340H/Y/F double eccentric ball valve utilizes an eccentric valve body, 偏心球, 和阀座. 当阀杆旋转时, 它会自动沿着共同的轨迹居中, 关闭时进一步收紧以实现完美密封. 球体与阀座完全分离, 消除密封圈磨损，克服传统球阀密封面与球体不断磨损的问题. 金属座内嵌有非金属弹性材料, 为座椅金属表面提供出色的保护. 该产品特别适合钢铁行业介质, 铝工业, 纤维, 小固体颗粒, 纸浆, 煤灰, 和石油气.
产品名称: Double Eccentric Ball Valve
产品型号: PQ340H, PQ340Y, PQ340F
公称直径: DN15～DN2200
结构: 球形
公称压力: 1.6Mpa～32.0Mpa
连接方式: 法兰
适用温度: -20℃～+180℃～350℃～550℃
驱动方式: 手动的, 蜗轮, 电的, 气动
阀体材质: 碳钢, 铸钢, 世界CB, 不锈钢
制造标准: 国标 (中国国家标准), 从 (德国标准), 应用程序编程接口 (美国标准), 美国国家标准协会 (美国标准)
适用媒体: 水, 油, 泥浆, 污水, 气体, 液体
制造商:浙江科三阀门有限公司, 有限公司.
PQ340H, PQ340Y, PQ340F Side-mounted eccentric hemispherical valve Product Description
The PQ340H/Y/F double eccentric hemispherical valve utilizes an eccentric valve body, 偏心球, 和阀座. 当阀杆旋转时, 它会自动沿着共同的轨迹居中, 关闭时进一步收紧以实现完美密封. 球体与阀座完全分离, 消除密封圈磨损，克服传统球阀密封面与球体不断磨损的问题. 金属座内嵌有非金属弹性材料, providing excellent protection for the metal surface of the valve seat. This product is particularly suitable for media such as those found in the steel industry, 铝工业, fibers, 小固体颗粒, 纸浆, 煤灰, 和石油气.
PQ340H, PQ340Y, PQ340F Side-mounted eccentric hemispherical valve Structural Features
1. The valve seat has an external step that mates with the internal step of the valve body, preventing the ball from jamming or disengaging from the valve seat.
2. 使用偏心阀体, 偏心球, 和阀座, 阀杆在旋转过程中自动沿着共同轨迹居中. 关闭期间, it tightens more and more, 实现完美密封. 所以, the eccentric hemispherical valve offers safe and reliable sealing performance. When the valve opens and closes, the ball completely disengages from the valve seat, 消除密封面磨损，克服传统球阀阀座与球体密封面不断磨损的问题.
3. 金属座内嵌有非金属弹性材料, providing excellent protection for the metal sealing surface of the valve seat.
4. The hemispherical notch creates a shearing effect between the ball and the valve seat, 使其特别适用于含有纤维的介质, 小固体颗粒, 浆料, ETC.
5. 当完全打开时, it has a large flow capacity, 压力损失低, and the medium will not accumulate in the valve body cavity.
6. This product features precise adjustment and reliable positioning functions. Its flow characteristics are approximately percentage-based, with a large adjustable range and a maximum adjustment ratio of 100:1.
PQ340H, PQ340Y, PQ340F Side-mounted eccentric hemispherical valve Execution Standards
设计与制造: GB12237-89
法兰连接: GB/T17241.6998, GB/T9115 (钢)
结构长度: GB12221-89
压力测试: GB/T13927
性能参数
公称压力 (兆帕): 0.6 1.0 1.6 2.5 4.0
公称直径 (毫米): 40-600 40-600 40-600 40-600 40-600
密封试验压力 (兆帕): 0.66 1.1 1.76 2.75 4.4
外壳试验压力 (兆帕): 0.9 1.5 2.4 3.75 6.0
适用温度 (℃): -29～300, -29～425, -29～540
Applicable Media Suitable for: liquids such as clean water, 海水, 污水, acids and alkalis, 浆料, 蒸汽, 燃气, and oils.
Drive method: 手动的, 电的, 气动.
Connection type: 法兰连接, clamp connection.
Installation method: 垂直安装, horizontal installation.
PQ340H, PQ340Y, PQ340F Side-mounted eccentric hemispherical valve bill of materials
Serial number Name and specification Material
1 bottom cover 25
2 Hexagon socket bolts 35CrMo
3 Gasket Flexible graphite
4 阀体 WCB
5 Lower stem 2Cr13
6 sphere WCB
7 Sliding bearing copper-based alloy or stainless steel
8 垫片柔性石墨
9 Valve seat + surfacing alloy steel 25
10 Valve seat support 25
11 Hexagon socket bolts 35CrMo
12 keys 40Cr
13 Upper valve stem 2Cr13
14 Sliding bearing copper-based alloy or stainless steel
15 packing pad 2Cr13
16 filler flexible graphite
17 Packing gland WCB
18 bracket WCB
19 stud 35CrMo
20 坚果 45
21 stud 35CrMo
22 坚果 45
23 stud 35CrMo
24 坚果 45
25 keys 40Cr
26 Manual operator assembly
PQ340H, PQ340Y, PQ340F Side-mounted eccentric hemispherical valve Main parts materials
Valve body valve cover GB WCB ZG1Cr18Ni9Ti ZG0Cr18Ni12Mo2Ti ZG15Cr1Mo1V
ASTM WCB CF8 CF8M WC9
Sphere GB ZG2Cr13 ZG1Cr18Ni9Ti Special surface treatment ZG0Cr18Ni12Mo2Ti Special surface treatment ZG15Cr1Mo1V Special surface treatment
ASTM CA15 CF8+HF CF8M+HF WC9+HF
Valve stem GB 2Cr13 1Cr18Ni9Ti 0Cr18Ni12Mo2Ti 25Cr2Mo2V
ASTM 420 304 316 F22a
Valve seat GB PTFE 2Cr13 PTFE 1Cr18Ni9Ti PTFE 0Cr18Ni12Mo2Ti D517
ASTM PTFE 420 聚四氟乙烯 304 聚四氟乙烯 316 HF
Filler GB PTFE Flexible Graphite PTFE Flexible Graphite PTFE Flexible Graphite Flexible Graphite
ASTM PTFE Flexible Graphite PTFE Flexible Graphite PTFE Flexible Graphite Flexible Graphite
Bolt GB 35 0Cr18Ni9 0Cr18Ni9 15Cr1Mo1V
ASTM A193 B7 A320-B8 A320-B8 A193 B16
Nut GB 45 0Cr18Ni9 0Cr18Ni9 20CrMo
ASTM A194 2H A194-8 A194-8 A194-4
