Coal Tar Coated RS Gate Valves

Description

API 600 Rising Stem Gate Valve Technical Data Sheet

(Hard Seat / Coal Tar Epoxy Coated)

Product Name: API 600 Bolted Bonnet Rising Stem Gate Valve (OS&Y)
Model: Z41H/Y – Class 150Lb ~ 600Lb
Date: February 16, 2026

1. Product Overview

This valve features an Outside Screw and Yoke (OS&Y) rising stem design. It is strictly designed according to API 600 (the benchmark standard for steel gate valves) and ASME B16.34 for pressure-temperature ratings. The disc and seat feature a hard-face seal (metal-to-metal ground fit), making it suitable for high-temperature, high-pressure, and erosive media. The external surface is protected by a Coal Tar Epoxy coating, providing exceptional resistance to soil corrosion and saline environments. It is particularly recommended for buried pipelines, marine terminals, and petrochemical refining projects.

2. General Technical Specifications

3. Material of Parts Specification

Note: The following is a typical carbon steel configuration (suitable for Coal Tar Epoxy coating). Alloy steel can be selected based on service conditions.

4. Coal Tar Epoxy Coating Specifications

• Applicable Standard: SSPC Paint 20 / NACE No.12 / Corporate Heavy-Duty Specification
• Coating Type: High-build Coal Tar Epoxy
• Surface Preparation: Abrasive blast cleaning to Sa 2.5 (Near-White) , surface roughness 40-75μm
• Coating Thickness:
• Dry Film Thickness (DFT): ≥ 300 μm (Reinforced grade 500-800μm available upon request)
• Typically applied as a multi-coat system (primer + intermediate + top coat)
• Characteristics: Resistant to saltwater immersion, microbiologically influenced corrosion (MIC), cathodic disbondment, and has strong impermeability.

5. Main Technical Characteristics

1. Rising Stem (OS&Y) Design: The stem rises and lowers with the wedge. The valve opening position is visually indicated by the stem position relative to the yoke.
2. API 600 Heavy-Duty Design: Conforms to API 600 requirements, including minimum wall thickness, bonnet thickness, stem diameter, and seat ring dimensions, ensuring robustness and long service life.
3. Hard-Face Seat Design: The sealing surfaces of the wedge and seat are overlaid with hard alloy (e.g., Stellite) . This hardened surface maintains reliable sealing even in media containing solid particles.
4. Flexible Wedge Option: For Class 300 and above, or for larger diameters, a flexible wedge design compensates for thermal distortions and prevents jamming.
5. Coal Tar Epoxy Heavy-Duty Coating: This coating is the preferred anti-corrosion solution for buried and marine services. It effectively isolates water, oxygen, and ionic penetration.
6. Backseat Design: Allows for repacking under pressure (online maintenance).

6. Principal Dimensions & Connection Data (Reference for Class 150 RF)

Note: Final dimensions subject to approval drawings. Conforms to ASME B16.10.

7. Applicable Standards & Testing

• Design & Manufacture: API 600 (13th Edition or Latest) – Steel Gate Valves
• End Flanges: ASME B16.5
• Face-to-Face: ASME B16.10
• Pressure-Temperature Rating: ASME B16.34
• Pressure Tests:
• Shell Test: 1.5 x Rated Pressure at ambient temperature
• High-Pressure Seat Test: 1.1 x Rated Pressure at ambient temperature
• Low-Pressure Pneumatic Test: 0.5-0.7 MPa (if specified)
• Inspection Standard: API 598

8. Remarks

• This valve is designed and manufactured in full accordance with API 600.
• Coal Tar Epoxy is a heavy-duty anti-corrosion coating. After curing, it appears black or dark brown and offers excellent weathering resistance and impermeability.
• For high-temperature, high-pressure, or abrasive media, Stellite 6 hardfacing on the seat faces is strongly recommended.
• Available Operations: Handwheel, Gearbox, Electric Actuator, Pneumatic Actuator.

GUATANTEE:

SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.