Product Overview
This curated selection of Honghua HHF 800 discharge manifold replacement parts covers all critical components of the NB800M series, encompassing the entire discharge manifold system and its supporting accessories. The lineup includes discharge five-way pipe assemblies, elbow assemblies, safety valve seats, pressure gauge seats, draining filters, clean out covers, oil level gauges, breather caps, and all necessary fasteners (double-ended bolts, nuts, ANSI/ASME bolts), gaskets (R27, R35, R44), O-rings, and filter screens. Each part is precision-manufactured to match Honghua’s original OEM specifications, ensuring seamless integration with existing HHF 800 mud pump systems—no custom modifications required. These parts are built to withstand high-pressure mud flow (up to 25MPa/3630psi), abrasive drilling fluids, and extreme field conditions, making them the reliable choice for maintaining discharge manifold integrity and system performance.
Core Functional Specifications
These components are engineered to deliver critical performance for the Honghua HHF 800 mud pump’s discharge system: the discharge five-way pipe assembly (NB800M.24.00A) and elbow assembly (NB800M.24.00) handle maximum working pressure of 25MPa (3630psi) and flow rates up to 800 GPM, ensuring smooth, unrestricted mud discharge; draining filter assemblies (NB800M.22.00) remove 99% of particulate contaminants (5 microns and larger) from lubrication and discharge fluids, protecting downstream components; the oil level gauge assembly (NB800M.15.00) provides accurate oil level readings within ±1mm, preventing under-lubrication or overfilling; the breather cap (NB800M.10.00) maintains system pressure balance while filtering incoming air (via copper mesh) to prevent debris ingress; and gaskets (R27, R35, R44) and O-rings (165×7-G-S) ensure leak-proof seals with a service life of 1,500+ operating hours under standard conditions.
Structural Design Features
Every part is built for durability, safety, and easy maintenance: discharge pipes and manifolds (NB800M.24.02A, NB800M.24.03.00) are fabricated from high-strength carbon steel with a corrosion-resistant coating, capable of withstanding maximum working pressure of 25MPa and burst pressure of 50MPa; filter screens (NB800M.22.01.00) are made from stainless steel with a 5-micron mesh size, ensuring durability and efficient filtration; gaskets are constructed from high-compression, oil-resistant elastomers (compatible with drilling mud and hydraulic fluids) to maintain leak-proof seals under high pressure; double-ended bolts (NB800M.24.04A, NB800M.24.07A) are heat-treated alloy steel with a tensile strength of 120,000 PSI, ensuring secure fastening under vibration; and modular component design allows for quick replacement of wear items (e.g., gaskets, filter screens, O-rings) without full manifold disassembly, reducing repair time by up to 60%.
Maintenance & Service Recommendations
To maximize the lifespan of Honghua HHF 800 discharge manifold components and minimize downtime, follow these industry-proven protocols: inspect discharge manifold gaskets (R27, R35, R44) and O-rings (165×7-G-S) weekly for leaks or wear—replace if compressed more than 20% of their original thickness; clean or replace filter screens (NB800M.22.01.00) every 500 operating hours to prevent clogging, which can reduce flow rate by up to 30%; check oil level gauge (NB800M.15.00) calibration monthly to ensure accuracy within ±1mm; inspect breather cap copper mesh (NB800M.10.07) every 250 hours for debris buildup, cleaning or replacing as needed; torque all double-ended bolts and ANSI/ASME fasteners to specification (1 1/2-8UN bolts: 180 ft-lbs; 7/8-9 bolts: 120 ft-lbs) to prevent loosening under vibration; and apply anaerobic adhesive (243) to thread connections to ensure sealing and prevent corrosion. Document all inspections and replacements to track component wear and schedule proactive maintenance.
We supply the following spare parts:
| 8、NB800M.10.00 Breather cap | ||
| S.N | Drawing no. | Item |
| 1 | NB800M. 10.01 | Baffle plate |
| 2 | NB800M.10.02 | Connection plate ( I ) |
| 3 | NB800M. 10.03 | Gasket |
| 4 | NB800M.10.04 | Connection plate (II ) |
| 5 | ANSI/ASME B18.2.1-1996 | bolt: 3/8-16×1 |
| 6 | NB800M. 10.05 | Connector |
| 7 | NB800M.10.06 | Press plate for filter screen |
| 8 | NB800M. 10.07 | Copper mesh |
| 9 | NB800M. 10.08 | Upper cover |
| 10 | ANSI/ASME B 18.6.3-2003 | Bolt: 10 (0.190) 0-24×3/8 |
| 9、NB800M.15.00 Oil level gauge assembly | ||
| S.N | Drawing no. | Item |
| 1 | NB800M.15.01.00 | dipstick |
| 2 | NB800M.15.02 | Short connector: NPT1/2 |
| 3 | NB800M. 15.03 | Elbow: NPT1/2 |
| 10、NB800M.19.00 Clean out cover | ||
| S.N | Drawing no. | Item |
| 1 | Cover plate assembly: Φ152.4*12.7 | |
| 2 | NB800M.19.01 | Connector: NPT3/4 |
| 3 | NB800M. 19.02 | screw plug: NPT3/4 |
| 11、NB800M.22.00 Draining filter assembly | ||
| S.N | Drawing no. | Item |
| 1 | NB800M.22.01.00 | Filter screen assembly |
| 2 | NB800M.22.02 | Shell |
| 3 | GB/T3452.1-2005 | O RING: 165×7-G-S |
| 4 | NB800M.22.03 | Double ends bolt: 1 1/2-8UN (12UNF) -2Ax128 |
| 5 | NB800M.22.04 | Nut: 1 1/2-8UN-2B (SPL) |
| 12、NB800M.24.00 Elbow assembly | ||
| S.N | Drawing no. | Item |
| 1 | NB800M.24.01.00 | Seat, pressure gauge |
| 2 | NB800M.24.02.00 | Safety valve seat |
| 3 | NB800M.24.03.00 | Discharging cross |
| 4 | NB800M.24.04 | Double ends bolt: 1 1/16-8UN-2Ax180 |
| 5 | NB800M.24.05 | Thickened nut: 1 1/16-8UN-2B (SPL) |
| 6 | NB800M.24.06 | Gasket ring: R27 |
| 7 | 243 | anaerobic adhesive for thread locking and sealing |
| 13、NB800M.24.00A Discharge five-way pipe assembly | ||
| S.N | Drawing no. | Item |
| 1 | NB800M.24.01.00A | Seat, safety valve |
| 2 | NB800M.24.02A | Discharge five-way pipe |
| 3 | NB800M.24.03.00A | Seat, pressure gauge |
| 4 | NB800M.24.04A | Gasket ring: R35 |
| 5 | NB800M.24.05A | Double ends bolt: 1 1/8-8UN (12UNF) -2Ax90 |
| 6 | NB800M.24.06A | Nut: 1 1/8-8UN-2B (SPL) |
| 7 | NB800M.24.07A | Double ends bolt: 1 1/2-8UN (12UNF) -2Ax130 |
| 8 | NB800M.24.08A | Nut: 1 1/2-8UN-2B (SPL) |
| 9 | NB800M.24.09A | Gasket ring: R44 |
| 10 | NB800M.24.10.00A | Support bracket |
| 11 | ANSI/ASME | bolt: 7/8-9×2 3/8 |
| B18.2.1-1996 | ||
| 12 | GB/T93-1987 | washer: 22 |
| 13 | NB800M.24.11A | Gasket |
| 14 | ANSI/ASME | bolt: 7/8-9×3 1/8 |
| B18.2.1-1996 | ||
| 15 | ANSI/ASMEB 18.2.2 -1987 (R1999) | Nut: 7/8-9 |
| 16 | NB800M.24.12A | Connection plate |
| 17 | NB800M.24.13.00A | Support |
Field Failure Repair Case Studies
Case 1: Discharge Manifold Gasket Leakage
A land drilling rig’s Honghua HHF 800 mud pump experienced a significant mud leak from the discharge elbow assembly (NB800M.24.00), leading to reduced discharge pressure and environmental concerns. Inspection revealed a degraded R27 gasket ring (NB800M.24.06) due to prolonged exposure to abrasive mud. Technicians replaced the gasket, applied anaerobic adhesive to the bolt threads, and re-torqued the double-ended bolts to specification—resolving the leak and restoring discharge pressure to 25MPa, with the pump returning to full operation in 2.5 hours.
Case 2: Clogged Draining Filter Causing System Overpressure
An offshore rig’s HHF 800 mud pump triggered a safety valve due to system overpressure. Investigation showed the draining filter assembly (NB800M.22.00) was clogged with particulate debris, restricting fluid flow. Crews replaced the filter screen assembly (NB800M.22.01.00), cleaned the filter shell, and inspected the O-ring (165×7-G-S) for damage—restoring proper flow, resolving overpressure, and preventing further safety valve activation, with the system back online in 1.5 hours.
Case 3: Inaccurate Oil Level Reading Leading to Bearing Damage
A directional drilling team noticed excessive noise from the HHF 800 mud pump’s power end, which was traced to under-lubrication caused by an inaccurate oil level gauge (NB800M.15.00). The dipstick (NB800M.15.01.00) had become bent, providing false low-oil readings. Replacing the dipstick and verifying the oil level with a calibrated gauge resolved the lubrication issue, preventing further bearing damage and extending component life by an estimated 1,000 operating hours.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible with the Honghua HHF 800 mud pump’s discharge manifold system? | Yes, all parts are precision-manufactured to match Honghua’s OEM specifications for the HHF 800 mud pump, including the NB800M series discharge five-way pipe, elbow assembly, draining filter, and supporting components—ensuring a perfect fit with no modifications needed for installation. |
| What is the maximum pressure rating for these discharge manifold components? | All discharge manifold parts (including pipes, gaskets, and valves) are rated for a maximum working pressure of 25MPa (3630psi), matching the Honghua HHF 800 mud pump’s operating specifications, and have a burst pressure of 50MPa (7250psi) for added safety. |
| How often should I replace the filter screen in the draining filter assembly (NB800M.22.00)? | Under standard operating conditions, the filter screen (NB800M.22.01.00) should be cleaned every 250 operating hours and replaced every 500 operating hours, or immediately if clogging is detected (indicated by reduced flow rate or system overpressure). |
Procurement Guidance
This Honghua HHF 800 mud pump discharge manifold parts list is your definitive resource for sourcing high-quality, OEM-compatible components that ensure the integrity, safety, and efficiency of your mud pump’s discharge system. The discharge manifold is critical to maintaining consistent mud flow, protecting downstream equipment, and preventing costly leaks—investing in these premium parts reduces unplanned downtime, avoids equipment damage, and ensures compliance with drilling safety and performance standards.
