Coal Tar Coated RS Gate Valves

Valve Type Bolted Bonnet, Outside Screw and Yoke (OS&Y), Rising Stem Gate Valve
Nominal Size (NPS) 2″ ~ 24″ (DN50 ~ DN600)
Pressure Class Class 150 / Class 300 / Class 600
Structure Style Rising Stem, Solid Wedge / Flexible Wedge
Connection Type Flanged Ends (ASME B16.5 RF / RTJ)
Temperature Range -29°C ~ +425°C (-20°F ~ +800°F) for Carbon Steel
Applicable Media Water, Steam, Oil, Natural Gas, Corrosive Fluids
Design Standard API 600 (Steel Gate Valves)
Face-to-Face Dimension ASME B16.10
Pressure Testing API 598

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설명

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

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.

General Technical Specifications

Item	사양
밸브 유형	Bolted Bonnet, Outside Screw and Yoke (OS&Y), Rising Stem Gate Valve
Nominal Size (NPS)	2″ ~ 24″ (DN50 ~ DN600)
Pressure Class	Class 150 / Class 300 / Class 600
Structure Style	Rising Stem, Solid Wedge / Flexible Wedge
Connection Type	Flanged Ends (ASME B16.5 RF / RTJ)
온도 범위	-29°C ~ +425°C (-20°F ~ +800°F) for Carbon Steel
Applicable Media	Water, Steam, Oil, Natural Gas, Corrosive Fluids
Design Standard	API 600 (Steel Gate Valves)
Face-to-Face Dimension	ASME B16.10
Pressure Testing	API 598

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.

Part Name	Material / Grade	Material Properties & Application
몸	Carbon Steel (ASTM A216 WCB)	Good strength and weldability. Substrate for the Coal Tar Epoxy coating.
Bonnet	Carbon Steel (ASTM A216 WCB)	Same material as body to ensure galvanic compatibility.
Wedge (Gate)	Carbon Steel with Hardfacing (Stellite 6/21)	Sealing surface overlaid with hard alloy for high hardness and erosion resistance.
Seat Ring (Sealing Face)	Hardfacing (Stellite 6/21) or Integral Machined Surface	Ground metal-to-metal hard seat, achieving zero or low leakage standards.
줄기	Stainless Steel (ASTM A182 F6a / F304)	High strength and corrosion resistance. F6a typically requires chrome plating to reduce friction.
Stem Nut	Aluminum Bronze (C95400) / Ductile Iron	High strength, self-lubricating, prevents stem galling.
Packing	Flexible Graphite	High-temperature resistance, self-lubricating, reliable sealing.
Gasket	Spiral Wound Gasket (SS+Graphite) / Solid Metal Ring (RTJ)	Ensures leak-proof sealing under high temperature and pressure.
External Coating	Coal Tar Epoxy	Specifically for heavy-duty anti-corrosion. Superior water resistance, chemical resistance, and cathodic disbondment resistance. Ideal for buried or underwater pipelines.

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.

Main Technical Characteristics

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.
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.
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.
Flexible Wedge Option: For Class 300 and above, or for larger diameters, a flexible wedge design compensates for thermal distortions and prevents jamming.
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.
Backseat Design: Allows for repacking under pressure (online maintenance).

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

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

NPS	Face-to-Face L (mm)	Flange Diameter D (mm)	Bolt Circle Diameter K (mm)	No. of Bolt Holes n	Hole Diameter d (mm)	Approx. Height H (Open) (mm)
2″	178	152	120.5	4	19	~400
3″	203	190	152.5	4	19	~500
4″	229	229	190.5	8	19	~620
6″	267	279	241.5	8	22	~800
8″	292	343	298.5	8	22	~950
10″	330	406	362	12	25	~1150
12″	356	483	432	12	25	~1350
14″	381	533	476	12	29	~1500
16″	406	597	540	16	29	~1700
18″	432	635	578	16	32	~1850
20″	457	698	635	20	32	~2000

Applicable Standards & Testing

Design & Manufacture: API 600 (13th Edition or Latest) – Steel Gate Valves
End Flanges: ASME B16.5
대면: 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

비고

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.

보증:

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