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High Pressure Ball Valves

The HYDAC family of dependable high pressure ball valves provides full, unrestricted flow and positive shut-off of fluids and gases under extreme service conditions. Models are available to accommodate system pressures up to 7,250 PSI. Since a variety of materials are available, HYDAC valves can be used with various fluids and gases including petroleum based oils and some water glycols.

The design of HYDAC ball valves is based on the “floating ball” principle which allows the ball to turn freely between the ball seals. A positive seal is attained by fluid pressure acting on the upstream surface of the ball and producing a constant uniform contact between the downstream ball seal and the ball. The ball is operated by a sealed spindle with a projecting square end to which the control handle or optional actuator is attached. Ball valves are intended to be used as on/off flow control devices and are not to be used to throttle fluid flow. The valves should always be either fully open or closed.

Features

  • Full passage for unrestricted flow of medium
  • Floating ball provides positive seal
  • Direction of flow indicated by milled slot in control spindle
  • Valve positioning controlled by a stop pin and limit washer
  • Fluoroelastomer O-rings (standard)
  • Zinc plated carbon steel valve body (standard)

Available Options

HYDAC can furnish ball valves with special options including:

  • Locking devices
  • Stainless steel valve bodies
  • Pneumatic or electrical actuators
  • Limit switch
  • Off-set or straight control handles

Product Improvements

Zinc Plating: Carbon Steel Valves now come with Zinc Plating as the standard surface finish. Corrosion protection is improved.

Pressure Rating: Standard Carbon Steel Valves now rated up to 6000psi see specific product pages for details.

Engineering Data

Housing
Block Type (KHB)Carbon Steel (standard) 14˚F Min temp
Forged Type (KHM)Forged Steel (standard) 14˚F Min temp
Stainless Steel (optional) -40˚F Min temp
CoatingsStandard Models Phosphate Coated (Others available on Request)
Ball
Ball Chrome Plated Steel (standard)
Stainless Steel (optional)
Spindle
Zinc Plated Steel (standard)
Stainless Steel (optional)
Handles
11XStraight Aluminum, Red Anodized
12XOffset Aluminum, Red Anodized
16XOffset Steel, Galvanized
Ball Seal
Polyacetal (POM) Standard for Hydraulic Oils, Water GlycolMaximum Pressure: to 7250 psi (500 bar)
Temperature Range: -22° to 212°F (-30° to 100°C)
PTFE For Corrosive MediaMaximum Pressure: to 1500 psi (100 bar)
Temperature Range: -328° to 212°F (-200° to 100°C)
Temperature to 392°F (200°C) at reduced Pressure (see chart below for pressure-temperature profile)
NBR For Gaseous MediaMaximum Pressure: to 1500 psi (100 bar)
Temperature Range: -13° to 212°F (-25° to 100°C) (see chart below for pressure-temperature profile)
PEEK High Temperature SealMaximum Pressure: to 7250 psi (500 bar)
Temperature Range: -238° to 212°F (-150° to 100°C)
Better high temperature profile than PTFE Temperature to 482°F (250°C) at reduced Pressure
Spindle Seal and O-rings
Fluorocarbon (FPM) Standard for hydraulic oils and many acidsMaximum Pressure: to 7250 psi (500 bar)
Temperature Range: -4° to 392°F (-20° to 200°C)
NBR Seal for hydraulic oils, lubricants, greasesMaximum Pressure: to 7250 psi (500 bar)
Temperature Range: -13° to 212°F (-25° to 100°C)
PTFE for corrosive media and basesMaximum Pressure: to 1500 psi (100 bar)
Temperature Range: -328° to 212°F (-200° to 100°C)
Temperature to 392°F (200°C) at reduced pressure
EPR Ethylene Propylene Rubber for some phosphate estersMaximum Pressure: to 7250 psi (500 bar)
Temperature Range: -58° to 300°F (-50° to 150°C)
Special Seals
Other materials are available for special applications. Consult Robeck Fluid Power for your specific application.

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