Technical Specifications

ERGIL Quick RX Opening Closures are made of corrosion resistant seal materials with threaded and flanged connection for long life duration. You do not need a special tool or experience to install ERGIL Closures.


Dedicated ERGIL Design and Engineering team use the automatic software calculation system which is a technologic access to design and develop quick, safe, and economic solutions due to customers’ requirements.


Safety has been always emphasised by ERGIL team in every step of its design and manufacture. In this regard, one of the major safety feature, pressure warning (pressure pin) device was designed to be integrated with the mechanism that led closure to be locked or unlocked until it is ensured that the internal pressure of vessel has been emptied.

Quick RX Opening Closures Technical Specifications


ERGIL® RX Quick Closures are hydrostatically tested at required pressure on request and internal inspection with test certificates will be provided for each item. ERGIL also provides third party inspection such as TUV, Bureau Veritas or Lloyd on request.


ERGIL’s vast experience enables us to bear and meet complex projects and deliver great quality of service. ERGIL offers extensive machining capability, equipped with a wide variety of CNC mills, lathes, cutting, bending, rolling and welding machines.


Size Range 6” to 100” Nominal diameter
Class Ratings ASME 150# through to 2500#
For Pressures in excess of 2500#
Design Specifications ASME VIII Division 1
ASME VIII Division 1 with ‘U’ Stamp
ASME VIII Division 2
ASME VIII Division 2 with "U" Stamp
PD 5500 / BS EN 13445
Closure Orientation Horizontal or Vertical
Termination Design Specifications ASME B31.3, B31.4, B31.8
Other International standards are available on request
Types of Connection Butt Welded, Butt Welded with mitre for inclined/declined vessels, reduced access or flanged to clients requirements
Materials of Construction ASTM A350 LF2 / ASME II SA350 LF2
ASTM A694 F42 to ASTM A694 F70
Grade 304L or 316L Stainless Steel
Duplex Stainless Steel (UNS S31803)
Elastomeric Sealing Nitrile, Viton and Rapid Gas Decompression Resistant. Other material options available on request
Standard Closure Finish Removable rust preventative for client to finish paint after welding to vessel
Special Closure Finish Grade 316 Stainless Steel or Incoloy 625 Weld Overlay
Accessories ERGIL RX closure can be fitted with a ‘Smith Flow Control’ Type DL-3 Interlock. Other types of interlocks available on request
Horizontal Closures can be supplied with protective weather covers (Vertical closures are supplied with protective weather covers as standard)