CAMTOP Adjustable Choke Valve H2 Type offers precise 1/64″ incremental control up to 15,000 PSI for oilfield flow management. Features include API 6A compliance, stainless steel/carbide trim options, and built-in pressure relief safety.
CAMTOP Adjustable Choke Valve H2 Type | 15,000 PSI Wellhead Choke | API 6A
Description
CAMTOP Adjustable Choke Valve – H2 Type
Precision-engineered adjustable choke valve for variable flow control in oil and gas wellhead applications. Rated up to 15,000 psi WP with flanged or threaded end connections and external control indicator.
Up to 15,000 PSI
Adjustable Flow Control
API 6A Compliant
Wellhead Equipment
Adjustable Flow Control
API 6A Compliant
Wellhead Equipment
Product Overview
CAMTOO manufactures both Positive (fixed) and Adjustable Choke Valves rated for working pressures up to 15,000 psi WP, available with various end connection configurations. The H2 Type Adjustable Choke Valve is specifically designed for variable flow control applications.
The adjustable choke features an external control indicator that displays orifice size in 1/64-inch increments, allowing operators to precisely set and monitor flow rates. By rotating the hand wheel, the choke orifice size is varied to achieve the desired downstream flow, providing responsive and accurate well control.
This choke valve is widely used in choke and kill manifolds, production test headers, and wellhead flow control systems where precise pressure and flow rate management is critical.
Key Features & Design Highlights
1/64″ Increment Control
External control indicator shows orifice size in precise 1/64-inch increments, enabling micrometer-level flow rate adjustment for critical well control operations.
Flexible Configuration
Interchangeable components allow the same choke body to be configured as Positive (fixed), Adjustable, or Combination choke valve to meet varying operational requirements.
Pressure Relief Safety Feature
Built-in safety mechanism releases trapped body pressure before the bonnet nut is fully disengaged. Upon partial unthreading, the valve body vents to atmosphere for safe disassembly.
Robust Bonnet Nut
Oversized bonnet nut with integral forged lugs designed for hammer-assisted loosening, ensuring reliable field serviceability even in harsh conditions.
Cross-Rating Interchangeability
Components within the same pressure class can be interchanged. Identical plug and bonnet assemblies used across 2-inch, 2,000 to 10,000 psi WP models for parts standardization.
Premium Needle & Seat Materials
Standard: Stainless steel construction. Severe service: Tungsten carbide or ceramic-lined needle and seat available for abrasive and high-velocity flow conditions.
End Connection Options
CAMTOP choke valves are available with various end connection configurations to match any wellhead, manifold, or flowline installation:
API Flanged
Standard API 6A flanged connections for wellhead and manifold integration
ANSI Flanged
ANSI B16.5 flanged connections for process and pipeline applications
Threaded
Precision API threaded connections for compact installations
Custom Connections
Bespoke end connections per customer project specifications
Technical Specifications
Working Principle
The CAMTOP H2 Type Adjustable Choke Valve operates on a variable orifice principle. A tapered needle (stem tip) is precisely positioned against a seat ring to create an adjustable annular flow passage. By rotating the hand wheel, the operator varies the gap between the needle and seat, thereby controlling the effective flow area and downstream pressure drop.
The external indicator mechanically translates stem position into a calibrated display showing the equivalent orifice diameter in 1/64-inch increments. This provides the operator with a reliable visual reference for repeatable flow settings.
Key Application: Adjustable choke valves are primarily used in choke and kill manifolds to control backpressure during drilling and well testing operations, regulate production flow rates, and manage pressure in multi-well header systems.
Oilfield Applications
- Choke and Kill Manifold flow control during drilling operations
- Production well testing, clean-up, and flowback operations
- Wellhead pressure regulation and production rate management
- Multi-well header systems requiring independent flow control
- Gas lift injection rate optimization
- Water injection well flow control and monitoring
Materials & Construction
Body & Bonnet
Forged alloy steel (AISI 4130/4140), heat-treated for high-pressure service with enhanced H2S corrosion resistance.
Needle (Stem Tip)
Standard: Stainless steel 316. Severe service: Tungsten carbide tip brazed to alloy steel stem for extreme erosion resistance.
Seat Ring
Stainless steel or ceramic-lined hardened alloy steel for sustained dimensional accuracy under abrasive flow conditions.
Bonnet Nut & Sealing
Forged alloy steel bonnet nut with metal-to-metal or PTFE/graphite stem packing for reliable pressure containment.
Hand Wheel
Heavy-duty ductile iron or forged steel construction with calibrated position indicator for precise orifice setting.
Fasteners
ASTM A193 B7 / B7M stud bolts with A194 2H / 2HM heavy hex nuts, suitable for NACE MR0175 sour service.
Operating Instructions
Flow Adjustment: Rotate the hand wheel clockwise (CW) to reduce orifice size and decrease flow rate. Rotate counterclockwise (CCW) to increase orifice size and flow rate. The external indicator displays the current setting in 1/64-inch increments. Always rotate the hand wheel smoothly; avoid rapid operation that may cause sudden pressure changes downstream.
Full Open Position: Rotate CCW until the indicator shows the maximum orifice setting. This position provides maximum flow area for well clean-up operations or when minimal flow restriction is desired.
Full Close: For positive shut-off applications, rotate CW until the needle seats firmly. A separate gate valve or block valve should be installed upstream or downstream for reliable isolation — the choke is NOT designed as a primary shut-off device.
Quality Assurance & Service Support
- API 6A Certified: Manufactured and tested to API 6A 21st Edition specifications
- Full Traceability: Comprehensive material certification with mill test reports (MTR)
- Hydrostatic Testing: Shell test at 1.5x working pressure per API 6A requirements
- NACE MR0175 Available: Sour service compliant materials and hardness control
- Spare Parts Availability: Comprehensive spare parts including needles, seats, packing, bonnet nuts
- Third-Party Inspection: DNV, ABS, Bureau Veritas inspection services available
Related CAMTOP Products
Positive Choke Valve
Fixed-orifice choke for applications requiring constant flow restriction. Available in range of orifice sizes.
External Sleeve Choke Valve
Model ES external sleeve design for high-capacity flow control with minimum turbulence.
Choke and Kill Manifold
Complete manifold assemblies integrating multiple choke valves for drilling and well control operations.
Model M Gate Valve
Threaded end gate valve for isolation service. Available in 2,000 / 3,000 / 5,000 PSI ratings.
Ordering Information
When requesting quotation for CAMTOP Adjustable Choke Valves, please specify the following parameters to ensure accurate configuration:
- • Choke configuration: Adjustable (H2 Type) / Positive / Combination
- • Working pressure rating (PSI / MPa)
- • End connection specification: API Flanged / ANSI Flanged / Threaded
- • Needle and seat material: Stainless Steel / Tungsten Carbide / Ceramic-lined
- • Service condition: Standard / Sour (NACE MR0175) / High Temperature
- • Quantity required and delivery schedule
- • Third-party inspection requirements (if applicable)
Frequently Asked Questions
Contact CAMTOP for Quotation & Technical Support
- Phone / WhatsApp: +86-18621723891
- Email: SALES@CPOSL.COM
- Website: www.camtop-oilfieldtools.com
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