HNA 400-HT

Key Features

1，Fully interchangeable with Halliburton HT400 and other mainstream international fluid ends

2，High-grade forged materials exceeding API 6A standard, custom materials available

3，Full traceability with unique heat ID, passed ASTM A370 test & ASTM A388 UT inspection

4，Excellent tensile, yield and impact resistance, anti-high pressure and anti-corrosion

5，Autofrettage or cold rolling inner surface treatment for extended service life

6，Compact lightweight structure, easy installation and maintenance

7，Maximum rated working pressure up to 20,000 PSI

8，Fit acidizing, cementing, gravel packing, snubbing; support API & non-API customization

Technical Specifications

Product Structure

This fluid end block is a monoblock high-pressure forging assembly matching HNA 400-HT plunger pump, modular design for easy maintenance, fully API 7K compliant.

Main Forged Body

Integral SAE 4330 alloy steel forging, high tensile strength, anti-abrasion and corrosion resistance, forms the main pressure-bearing cavity for fluid suction and discharge.

Suction & Discharge Valve Assemblies

Independent valve bores for each plunger cylinder, equipped with 17-4PH valve seats, valve balls and return springs. Quick access covers allow fast valve replacement without dismounting the whole block.

Plunger & Packing Chamber

Precision machined packing bores fit multi-layer HNBR packing sets. Supports interchangeable plungers of 2.0/2.25/2.5/2.75 inch diameters, with built-in lubrication ports for packing cooling.

High-Pressure Connection Ports

Large-size suction flange for stable fluid intake; standard high-pressure discharge outlet for fracturing pipeline connection, metal RTJ sealing to prevent leakage under max working pressure.

Tie Rod Mounting Lugs

Integrated mounting lugs on both sides for tie rod installation, tightly connecting fluid end and power end to resist high internal pressure during long-term continuous operation.

Compatible Brands

Halliburton，SPM，Jereh，Serva，Gardner Denver

Applications

• Onshore & Offshore Oil and Gas Exploration & Production

• Oilfield Well Service & Well Stimulation Industry

• High-pressure Downhole Operation Engineering

• Oilfield Fracturing, Acidizing and Cementing Service Sector

• Coiled Tubing & Snubbing Operation Service Industry

FAQ

Q: Is this HNA 400-HT fluid end fully interchangeable with Halliburton original HT-400 pump?

A: Yes. All mounting dimensions, valve bores, tie rod holes and connection flanges match OEM HT-400 standard.

Plungers, valve assemblies and packing kits can be directly replaced without secondary machining.

Q: What material is the fluid end block made of and does it meet API 7K?

A: Monoblock SAE 4330V alloy steel forging with integral heat treatment. It fully complies with API 7K standard, with complete material heat number traceability for oilfield well service.

Q: What is the maximum working pressure and optional plunger sizes for this fluid end?

A: Max rated working pressure 15,000 psi; optional plunger diameters: 2.0”, 2.25”, 2.5”, 2.75” to switch between high-pressure low-flow or large-displacement operation.

Q: What working applications is this 400-HT fluid end suitable for?

A: Designed for triplex cementing, acidizing, well killing, squeeze cementing and pipeline pressure testing; widely used in onshore oil & gas well stimulation and workover operations.

Q: What’s the warranty coverage for the fluid end block? Are wearing parts included?

A: 12-month warranty on the forged main body block. Consumables including plungers, valve seats, HNBR packing and springs are excluded from warranty due to abrasion during operation.

Q: How to extend the service life of the fluid end and avoid washout cracking?

A: Use proper suction pressure to prevent cavitation; adopt compatible anti-corrosion packing for acid fluid; regularly inspect valve seats and replace worn parts timely; maintain correct packing gland torque as per operation manual.

How HNA 400-HT Plunger Pump Fluid End Block Works

The fluid end is the high-pressure pressurizing component matched with triplex power end, which completes fluid suction and pressurized discharge relying on reciprocating plunger movement.

Suction stroke: The plunger retreats backward, the inner cavity volume of fluid end increases and pressure drops. The suction valve opens, fracturing/cementing fluid flows into the cylinder chamber, while the discharge valve keeps closed.

Discharge stroke: The plunger pushes forward, the inner cavity volume shrinks and pressure rises rapidly. The suction valve closes tightly, the discharge valve opens, and the fluid is squeezed out to high-pressure pipelines.

Three cylinders work in staggered circulation, which stabilizes output flow and reduces pressure fluctuation.

Built-in packing lubrication channel continuously supplies lubricant to the plunger sealing assembly to lower friction and prevent fluid leakage.