The KHB-G3/4 is a carbon steel, 2-way manual ball valve built for high-pressure fluid control. It uses a straight-through body with G3/4 female BSPP threads on both ends. A quarter-turn handle opens or closes the flow path. The valve seals reliably at up to 315 bar and works across a -29°C to 120°C temperature range.
This valve carries two common names in the market: KHB 2-way female thread high-pressure ball valve and KHB high-pressure ball core stop valve. Both refer to the same product — a manually operated on/off valve with a ball-and-seat sealing mechanism.
Ruihua Hardware supplies the KHB series for hydraulic and industrial fluid systems. Browse our full ball valve catalog for other sizes and pressure ratings.
Key Features
Carbon Steel Body, Rated to 315 bar
The valve body is precision-cast carbon steel. It holds PN 315 bar (31.5 MPa / 4,568 psi) without deformation. Each batch undergoes hydrostatic shell and seat leakage tests at 1.5× rated pressure before shipment.
Straight-Through 2-Way Design
The full-bore straight-through flow path keeps pressure drop low. When fully open, the ball bore aligns with the pipe ID, giving near-zero flow restriction. This design saves pump energy in continuous-flow systems.
Manual On/Off with G3/4 Female Thread
A lever handle turns the ball 90 degrees from fully open to fully closed. The G3/4 female BSPP threads on both ports accept standard male fittings. No special tools needed for installation — thread sealant or bonded washers complete the connection.
Wide Temperature Range: -30°C to 100°C
The carbon steel body and standard PTFE seats handle -30°C to 100°C. This covers cold-start hydraulic systems, heated process water lines, and most industrial fluid circuits. For applications outside this range, see our high-temperature valve series.
The KHB-G3/4 works across a broad set of industries. Its carbon steel body handles rough conditions in mines and machine shops. At the same time, its clean straight-through design meets the needs of food and pharmaceutical fluid lines.
Coal Mining
Machinery Manufacturing
Chemical Processing
Food Industry
Pharmaceutical
Laboratory & Testing
Building Services
Why Choose Ruihua Hardware
Ruihua Hardware focuses on industrial valves and fluid control components. Every KHB valve ships with traceable material certificates and test reports. The factory runs in-line pressure testing — no batch leaves without passing shell and seat leakage checks.
Customers choose us for three reasons: consistent product quality across orders, fast lead times on standard models, and direct factory pricing with no distributor markup. For custom port sizes or seal materials, contact our engineering team through the contact page.
Frequently Asked Questions
What is a KHB high-pressure ball valve used for?
A KHB high-pressure ball valve controls on/off flow in hydraulic systems, industrial piping, and fluid transfer lines. It handles hydraulic oil, water, emulsion, and other mixed liquids. Common uses include mining hydraulic supports, machine tool coolant lines, chemical dosing systems, and food processing fluid circuits.
What pressure can the KHB-G3/4 handle?
The KHB-G3/4 is rated PN 315 bar (approximately 31.5 MPa or 4,568 psi). Its carbon steel body and precision-ground ball-and-seat seal hold this pressure reliably in both open and closed positions.
Is the KHB-G3/4 compatible with hydraulic oil?
Yes. The KHB-G3/4 works with mineral-based hydraulic oils, water-glycol fluids, water-oil emulsions, and plain water. The carbon steel body and standard seal materials cover most common industrial hydraulic media.
How does Ruihua Hardware ensure valve quality?
Ruihua Hardware applies in-house pressure testing on every KHB valve batch. Each unit undergoes a shell test and seat leakage test at 1.5× rated pressure before shipment. Material certificates and test reports are available on request.
What thread standard does the KHB-G3/4 use?
The KHB-G3/4 uses G3/4 female BSPP (British Standard Pipe Parallel) threads on both ports. This is a 2-way, female-to-female (F/F) straight-through valve body. Sealing is achieved with a bonded washer or O-ring face seal, not the thread itself.
