H2 Needle-and-Seat Choke

H2 Needle-and-Seat Choke

Overview

Ideally suited for a broad range of choke applications, including wellheads, production manifolds, choke and kill manifolds, well testing, and cleanup operations

With pressure ratings to 15,000 psi, Cameron H2 needle-and-seat chokes handle standard, erosive, and corrosive service. Two configurations are available:
  • Positive chokes provide a fixed flow condition with a large selection of available bean sizes and types.
  • Adjustable chokes provide variable flow rates, but can be locked into position if a fixed flow rate is required.
An optional combination bean and seat converts the adjustable choke to a positive/adjustable choke for bringing on the well slowly with the adjustable feature. Once the desired flow rate is reached, the choke can be operated as a positive choke. This reduces wear on the wing or master gate valves because they are not used to control flow. In every application, the H2 choke delivers long life and low maintenance.
The H2 choke has an externally threaded body and is the industry standard for needle-and-seat choke valves.
  • Body pressure is automatically vented when the operator unscrews the bonnet nut one turn.
  • Bleed valve allows the operator to safely vent the body cavity pressure prior to removal of the bonnet assembly.
  • H2 choke is designed and manufactured in accordance with API 6A, including performance verification testing for PR-2 level choke valves.
  • Choke has a forged body.
  • Operation and maintenance are easy.

4444.bmp

Specifications


H2 Choke Valve Available Sizes and Pressures

NOMINAL SIZE, IN Available Needle/Max. Orifice Size, inPressure Range, psi
212,000–10,000
2115,000
322,000–10,000
432,000–5,000




 

H2 Choke Valve Material Recommendations

API MATERIAL CLASS BodyBonnetChoke Trim (Stem, Seat, Bean)
AA & BB General ServiceAlloy steelAlloy steelStainless steel or stainless steel and tungsten carbide
CC Non-Sour, High CO2Stainless steelStainless steelStainless steel or stainless steel and tungsten carbide
DD & EE- 0.5 Sour, Low CO2†Alloy steelAlloy steelStainless steel and tungsten carbide
FF – 0.5 Sour, High CO2†Stainless steelStainless steel Stainless steel and tungsten carbide
HH High H2S, High CO2†Corrosion resistant alloy Corrosion resistant alloy
Corrosion resistant alloy and tungsten carbide





*In compliance with NACE Standard MR-01-75