Knife Gate Valve Uni-Directional (DN50-1200) “Orbinox EX”

The Orbinox EX model knife gate valve is a Uni-Directional wafer valve designed for general industrial service applications. The design of the body and seat assures non-clogging shutoff on suspended solids in industries such as:

• Pulp and Paper
• Power plants
• Wastewater treatment plants
• Chemical plants
• Food and Beverage
• Bulk handling
• Mining, etc…

Sizes

DN50 to DN1200 (larger diameters on request)

Standard Flange Connection

EN1092 PN10 or ASME B16.5 (class 150)
Other Flange Connections on Request: EN1092 PN6/16/25 BST D and E, ASME 125

Working Pressure

DN 50 to DN 250: 10 bar
DN 300 to DN 400: 6 bar
DN 450: 5 bar
DN 500 to DN 600: 4 bar
DN 700 to DN 1200: 2 bar

Materials of construction

Orbinox “EX” Unidirectional Knife Gate Valve Parts Diagram

1. Body : GJL250(GG25)  Cast Iron or CF8M Stainless Steel
2. Gate : AISI 304 or AISI 316
3. Seat : Metal/Metal or EPDM
4. Packing : PTFE Impregnated Synthetic Fibre (With a EPDM O-Ring)
5. Gland Follower : Aluminium (DN 50 to DN 300) or Ductile Iron (DN 350 a DN 1200)
6. Stem : Stainless Steel
7. Stem nut: Brass
8. Yoke : Epoxy-coated Carbon Steel
9. “A” Ring : AISI 304 or AISI 316
10. Handwheel : GJS400 (GGG40)
11. Cap : Plastic
12. Stem Protector : Epoxy-coated Carbon Steel
13. Friction Washer : Brass
14. Nut : Zinc Plated Carbon Steel

Design Features

BODY:
Wafer style cast monoblock with raised faces and reinforcing ribs in large diameters for extra body strength. Internal cast-in gate wedges and guides allow for a tighter shut-off between gate and seat. Full port design for greater flow capacity and minimal pressure drop. The internal body design avoids any accumulation of solids that would prevent the valve from closing.

GATE:
Stainless steel gate. Gate is polished on both sides to avoid jamming and seat damage. Bottom of the gate edge is machined to a bevel to cut through solids for a tighter seal in the closed position. The thickness and/or material of the gate can be changed on request for higher pressure requirements.

SEAT (Resilient):
Unique design that mechanically locks the seal in the internal of the valve body with a stainless steel retainer ring. Standard EPDM also available in different materials such as Viton, PTFE, etc.

PACKING:
Long-life packing with several layers of braided fibre plus an EPDM o-ring, with an easy access packing gland ensuring a tight seal. Long-life braided packing is available in a wide range of materials. The standard stainless steel stem offers a long corrosion resistant life. For rising stem handwheel actuators only, a stem protector is provided for additional protection against dust while the valve is in the open position.

STEM::
The standard stainless steel stem offers a long corrosion resistant life. For rising stem handwheel actuators only, a stem protector is provided for additional protection against dust while the valve is in the open position.

ACTUATORS:
All actuators supplied by ORBINOX are interchangeable, and supplied with a standard mounting kit for installation purposes on site.

YOKE or ACTUATOR SUPPORT:
Made of EPOXY coated steel (stainless steel available on request). Compact design makes it extremely robust even under the most severe conditions.

EPOXY COATING:
The epoxy coating on all ORBINOX cast iron and carbon steel valve bodies and components is applied by means of an electrostatic process, making the valves corrosion-resistant with a high quality finished surface. The ORBINOX standard colour is RAL-5015 blue. ORBINOX automated valves are provided with gate guards in accordance with EU Safety Standards. The design feature prevents any objects from being caught accidentally while the gate is moving.

GATE SAFETY PROTECTION:
ORBINOX EX automated valves are provided with gate guards in accordance with EU Safety Standards. The design feature prevents any objects from being caught accidentally while the gate is moving.

Orbinox EX Variations – available upon request

Body : Cast Iron / Cast Steel

Seats & Seals : EPDM / Nitrile / Viton

Packing : PTFE impregnated synthetic fibre (ST) / Dynapack (DP) / Dry cotton (AS) / Braided PTFE (TH)

Actuation
Manual : Handwheel (non-rising stem) / Handwheel (rising stem) / Chainwheel / Lever / Bevel Gear / Others (square nut…)
Automatic : Electric (rising & non-rising stem) / Pneumatic (single & double-acting) / Hydraulic

Accessories : Mechanical Stops / Actuator manual override / Positioners / Proximity Switches / Stem Extensions / Locking device / Solenoid valves / Limit Switches / Floor stands

Orbinox “EX” Unidirectional Knife Gate Valve Catalogue / Datasheets

Orbinox Certificates & Directives Compliance

Orbinox Installation, Operation & Maintenance Manual