Objectives

The primary objective of this tender is to procure maintenance services for Level Control Valves, specifically Bermad valves, to ensure their operational functionality within the water supply infrastructure. The work aims to replace non-functioning valves, install new equipment, and ensure proper functioning through testing and commissioning, thereby improving water control and management in the specified areas.

Scope

The scope of work includes:

• Providing labour, materials, and equipment for maintenance and replacement of level control valves and Bermad valves.
• Pumping out water from chambers, removing faulty valves, and installing new ones.
• Excavating pipelines to expose installation points.
• Supplying and installing flanged level control valves (80mm) with all fittings.
• Constructing valve chambers according to specifications.
• Providing circular manhole rings with heavy-duty covers and concrete lids.
• Testing and commissioning all installations upon completion.
• Ensuring all work complies with relevant safety and construction standards, including OHS Act and CIDB grading requirements.
• Identifying and protecting existing services during excavation.

Technical Requirements

The technical requirements specify adherence to:

• Standards outlined in SABS 1200 series (AA, C, DA, DB, GA, LB, L) for general works, site clearance, earthworks, concrete, bedding, and pipelines.
• Use of materials conforming to SABS standards, including welding and steel specifications.
• Concrete strengths of at least 25 MPa (normal reinforced) and 30 MPa (mass concrete).
• Construction of valve chambers and installation of flanged level control valves (80mm) with bolts, nuts, and gaskets.
• Compliance with construction regulations of the OHS Act.
• CIDB grade rating of 1CE or higher for contractors.

Skills Requirements

The contractor must possess:

• CIDB grade of 1CE or higher, indicating capability in earthworks, concrete, and pipeline installation.
• Expertise in excavation, pipe installation, and valve installation.
• Ability to identify and manage existing services on site to prevent damage.
• Knowledge of safety regulations and compliance with the OHS Act.
• Experience in constructing valve chambers and installing control valves according to technical specifications.
• Capability to conduct testing and commissioning of installed equipment.