Double Acting Hydraulic Series

The Valveworks USA Double Acting Hydraulic Series consists of a lineup of actuators with reliable, proven designs that are engineered and manufactured to meet the requirements of API 6A. The Hydraulic Actuation allows for hydraulically powered operation to open and close the gate valve. This series of actuators offers the user several options depending on the specific gate valve size and pressure.

Double Acting Hydraulic Actuators are similar to each other in design with only slight variations across the lineup, offering a high percentage of parts interchangeability, giving you an efficiency-driven advantage in the management and maintenance of your actuator fleet, and providing optimal life cycle management integrity.

This brochure provides an in-depth look at the details of this series of actuators and explains the features, benefits, characteristics, dimensional & technical data, and other valuable information needed to determine which actuator provides an optimal solution for your specific application.

TABLE 1 – PRODUCT FEATURES

550 Series 650 Series 850 Series
Available valve bore sizes
& rated working
pressures (psi)
1 13/16” 10/15K
2 1/16” 5/10/15K
2 9/16” 10K
3 1/8” 5/10K
4 1/16” 5K
2 9/16” 15K
3 1/8” 15K
4 1/16” 15K
5 1/8” 3/5/10K
5 1/8” 15K
7 1/16” 3/5/10/15K
Maximum operating pressure (psi) 2500 2500 2500
Available PR(a) 2 2 2
Material classes AA AA AA
Stem type Rising Rising Rising
Stem packing type Opti-seal Opti-seal Opti-seal
Repacking YES(b) YES(b) YES(b)
Balance stem Yes Yes Yes
Temperature range -20°F (-29°C) THRU 250°F (121°C) -20°F (-29°C) THRU 250°F (121°C) -20°F (-29°C) THRU 250°F (121°C)

a) Performance Requirement.
b) Repacking is achieved via stem backseat method.

TABLE 2 – TEMPERATURE RATING

Temperature Classification Operating Range
P -20°F (-29°C) TO 180°F (82°C)
S 0°F (-18°C) TO 140°F (60°C)
T 0°F (-18°C) TO 180°F (82°C)
U 0°F (-18°C) TO 250°F (121°C)

TABLE 3 – MATERIAL REQUIREMENTS

Minimum Material Requirements
Material Class Body, Bonnet end & outlet
connections
Pressure-Controlling
parts & stems
AA General service Carbon or Low-alloy steel Carbon or Low-alloy steel

TABLE 4 – TECHNICAL DATA

Series Height (A) Diameter (D)
550 21 1/2 7 1/4
650 22 3/4 8 1/2
850 27 1/4 10 1/2

The dimensions B, C, and E vary for different series of Double Acting Hydraulic Actuators and different valve sizes chosen to accompany them.

Valveworks USA Copyright © 2022