Stark Solutions Quick Opening Closures

Stark Solutions designs, engineers, and manufactures high-quality Quick Opening Closures in a safe, technology-driven, and engaging environment.

S-500 Threaded Quick Opening Closure

S-500 Threaded Quick Opening Closure

The Stark S-500 Threaded Closure represents historically the most widely used closure style in the oil and gas sector. Based on the industry’s desire for robust and cost-effective solutions, Stark improved upon the standard design to bring the operation to a new level. Features to avoid hammering and strengthen operator control were incorporated into the otherwise proven design. The S-500 is manufactured in diameters ranging from 2” to 52” (DN50 to DN1300) and pressure series 150 through 1500.

Benefits

Proven and robust design
Economically priced
Certified to ASME B31.3/B31.4/B31.8/CSA Z662 Cat. I
Flat sealing surface for best seal results on all sizes
Bidirectional Hinge design allows the cap to open to the left and right side

Standards

2” to 4” (DN50 to DN100) closures designed for wrench opening
Opening tool supplied with 6″ to 52″ (DN150 to DN1300) closures
PAV per UG-35.2 of ASME BPVC VIII DIV. 1 on 6” and larger (2” to 4” optional)
Cap designed per ASME BPVC VIII DIV. 1, U-Stamp compliant
Nace MR0175 compliant material
-50° to + 400°F (-45° to 204°C)

Options

Flanged Closure – welded connection or one-piece
ASME BPVC VIII DIV. 1 with U-Stamp for whole closure (cap and hub)
Opening Wrench for 2” to 4″ (DN50 to DN100)
PAV per UG-35.2 of ASME BPVC VIII DIV. 1 on 2″ to 4″ (DN50 to DN100)
Stainless Steel and Inconel weld overlay on sealing surfaces
Custom Wall Thickness, vents, and other modifications
Special Materials and O-Rings
Horizontal, Vertical, or Inclined hinging

Adobe PDF Reader Stark Solutions Part Guide S-500

S-2000 Clamp Ring Quick Opening Closure

The S-2000 Clamp Ring Closure is manufactured primarily for pipeline applications ranging from 4” to 48” (DN100 to DN1200) in diameter. We understand the variety of needs that pipeline applications require and as a standard, all closures are certified to ASME B31.3/B31.4/B31.8/CSA Z662 Cat. I with a 0.5/0.6 design factor. High-quality components placed in user-friendly locations and features that keep safety priority, and the operator in focus make the S-2000 an appealing Clamp Style Closure option.

Benefits

Certified to ASME B31.3/B31.4/B31.8/CSA Z662 Cat. I
1480 M.A.W.P with 0.5 & 0.6 design factor
O-Ring location outside the working area protects from tools and debris
Pressure alert valve design without the need for O-Ring
Through bores on all wall thicknesses
Increased structural strength on the hub for warpage prevention

Standards

Door designed per ASME BPVC VIII DIV. 1, U-Stamp compliant
Pressure alert valve per UG-35.2 of ASME BPVC VIII DIV. 1
Clamp screw opening and door load binder assist on 32″ to 48″ (DN800 to DN1200) closures
Nace MR0175 compliant material
-50° to + 400°F (-45° to 204°C)
Viton O-Ring supplied with closure

Options

Flanged closure – welded connection or one-piece
ASME BPVC VIII Div. 1 with U-Stamp for the door only or full closure (door, hub, and clamp ring)
Clamp screw opening assist and load binder on 24″ to 30″ (DN600 to DN750) Closures
Custom wall thickness, vents, and other modifications
Special materials and O-Rings

Adobe PDF Reader Stark Solutions Part Guide S-2000

S-3000 Internal Door Quick Opening Closure

The S-3000 is Stark’s Internal Door Closure which is manufactured in diameters ranging from 6” to 84” (DN150 to DN2100) in pressure series 150 to 2500. The closure concept relies on the proven method of an internal locking ring that slides into the inner side of the closure hub. When expanded to the closed position, the locking ring assembly securely latches the door into place. Durable components are used to actuate the locking ring and are designed to withstand the demands of long-term operation. Regardless of orientation, size, or pressure rating the S-3000 maintains its benefits and ease of operation, making it the broadest closure choice for Pipeline and Pressure Vessel applications.

Benefits

Broad Size Range and Pressure Series
O-Ring design with a large cross-section on horizontal and 
vertical closures, for positive seal, protection from light wear 
and corrosion, and cost-efficiency
Lip seal design on horizontal and vertical closures
Improved operation with load binder assists on horizontal 
sizes 24” (DN600) and larger
Fail-safe Design

Standards

Certified to ASME B31.3/B31.4/B31.8/CSA Z662 Cat. I /
ASME SEC VIII DIV. 1
Pressure Alert Valve per UG-35.2 of ASME BPVC VIII DIV. 1
Nace MR0175 compliant material
-50° to + 400°F (-45° to 204°C)
Viton O-Ring supplied with closure

Options

Flanged Closure – welded connection or one-piece
ASME BPVC VIII DIV. 1 with U-Stamp for the door only or whole
closure (hub, door, locking ring)
Stainless Steel, duplex, super-duplex
Inconel or Stainless Steel weld overlay
External hinge trim for Offshore uses
Special materials and O-Rings
Horizontal, Vertical, or Inclined orientation
Hydraulic lift on vertical closures
Stainless Steel and Inconel weld overlay on sealing surfaces
Custom Wall Thickness, vents, and other modifications
Special Materials and O-Rings
Horizontal, Vertical, or Inclined hinging

Adobe PDF Reader Stark Solutions Part Guide S-3000

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