Parallel seat gate and seat ring construction can be furnished for high differential pressure services or where high piping loads or thermal expansion may cause sticking of a wedge type gate.

• 平行阀座闸阀和阀座环结构可以应用在高压差应用环境中，或者高管道负载，或可能导致楔形闸板闸阀卡住的热膨胀应用环境中。