A hydronic plant room works only when pressure maintenance, pumping, distribution, balancing and control are assigned to the right equipment instead of being treated as one generic water-supply package.
Coordinate YONGFAN JFDY bladder pressure vessels (0.20–8.53 m³), JFWP packaged closed-loop expansion skids (48–480 m³ water capacity), JFHB constant-pressure VFD boosters (8–5,500 m³/h), JFWZ direct municipal non-negative-pressure units (8–280 m³/h), custom water distributors/collectors (DN50–DN500 main), balancing valves, 100X–900X hydraulic valves, and JFLN steam condensate recovery.
Installing a domestic booster pump on a closed chilled-water loop fails to accommodate thermal expansion, causing pressure relief dumping.
Connecting standard booster pumps directly to municipal mains without non-negative-pressure controls violates municipal water codes.
Fabricating distribution manifolds without branch balancing valves leaves index circuits starved while near circuits overflow.
Installing 800X differential-pressure bypass valves on individual branch coils instead of central chiller decoupling headers.
Bladder-type pneumatic pressure vessel for closed-loop pressure stabilization and volume buffering (0.20–8.53 m³ total tank volume, 0.06–3.10 m³ effective regulating volume, PN 0.6/1.0/1.6 MPa, Ø400–Ø2000 mm, ≤80 °C water). Replaceable butyl-rubber bladder with dry nitrogen pre-charge.
Factory-assembled closed-loop pressurization and expansion skid (heating area 10,000–200,000 m², cooling area 5,000–85,000 m², system water capacity 48–480 m³, make-up flow 2.4–24 m³/h, head 24–112 m, 0.6/1.0/1.6 MPa). JFWP-A is compact without atmospheric tank; JFWP-B includes atmospheric expansion vessel.
Variable-frequency booster pumping system for water supply from break tanks or positive-pressure sources (8–5,500 m³/h flow, 20–250 m head, 0.55–315 kW, regulation accuracy ≤0.01 MPa, PN 0.6/1.0/1.6 MPa). Automatically adjusts pump speed and staged staging to maintain constant network pressure.
Connects directly to municipal water mains without requiring an atmospheric break tank (8–280 m³/h standard, 20–250 m head, 0.37–280 kW, ≤0.01 MPa accuracy, CJ/T 265 standard). Utilizes available municipal residual pressure while actively preventing negative pressure on the municipal main.
Custom-fabricated headers that divide supply mains and merge return circuits (working pressure to 2.0 MPa, <100 °C, carbon steel or stainless steel). Features 2–12+ branches (DN15–DN300), main diameters DN50–DN500, custom branch spacing, instrument tapping ports, and 1.5× hydrostatic testing.
Coordinates circuit resistance and plant-level hydraulic functions. Includes DRV/KPF manual static balancing, BYF dynamic constant-flow balancing (20–300 kPa), ZYC differential-pressure controllers, and 100X–900X pilot-operated hydraulic valves (including 800X differential-pressure bypass).
Closed high-temperature steam condensate recovery unit available in 10 standardized sizes (JFLN-1 to JFLN-100, DN40–DN175 connections). Captures high-temperature condensate and flash steam, returning treated hot water directly to the boiler feed system to conserve thermal energy and water.
| Plant-Room Problem | Product Family | Documented Boundary | First Input to Confirm |
|---|---|---|---|
| Closed-loop pressure buffer | JFDY Water Make-Up Unit | 0.20–8.53 m³ vessel, 0.6/1.0/1.6 MPa | System volume and pressure setpoints |
| Integrated closed-loop pressure + expansion | JFWP Expansion Unit | 48–480 m³ system volume, 2.4–24 m³/h make-up | System water volume and static head |
| Booster supply from tank / approved source | JFHB VFD Water Supply | 8–5,500 m³/h, 20–250 m head | Peak demand & suction source condition |
| Direct municipal mains boosting | JFWZ Non-Negative | 8–280 m³/h, 20–250 m head | Municipal pressure profile & approval |
| Multi-zone supply/return distribution | Manifolds (Distributor/Collector) | DN50–DN500 main, 2–12+ branches | Total flow & branch schedule |
| Branch hydraulic circuit balance | Balancing Valves (DRV/BYF) | Family-specific (DN15–DN800) | Branch flow rate & available ΔP |
| Large-system pressure/flow control | 100X–900X Hydraulic Valves | Function-specific (DN50–DN1200+) | Controlled variable & setpoints |
| Steam-condensate thermal recovery | JFLN Condensate Units | JFLN-1 to JFLN-100 (DN40–DN175) | Condensate flow rate, pressure & temp |
Define Closed Hydronic Loop (JFWP/JFDY) or Domestic/Process Water Supply (JFHB/JFWZ).
Calculate total system water volume (m³), static height (m), design working pressure, and pump head.
Specify water distributor main DN (DN50–DN500), branch count, individual branch flows, and DRV/BYF balancing.
Confirm municipal direct-boosting approval (JFWZ) or break tank storage requirements (JFHB).
YONGFAN hydronic engineers will verify expansion tank sizing, calculate pump head and VFD staging, configure distributor branch dimensions, and supply complete submittal drawings.
JFDY pressure tanks and JFWP wetted circuits are hydrostatically tested to 1.5× design pressure for 30 minutes.
Packaged skids undergo full-load electrical testing: duty/standby alternation, overpressure relief, and low-water cut-out.
JFWZ non-negative units are verified on a test loop simulating adequate and inadequate municipal pressure to verify bypass switching.
Custom water distributors undergo weld penetration checks and 1.5× design pressure hydrostatic verification before painting.
JFDY is fundamentally the bladder pressure vessel buffer. JFWP is a complete integrated closed-loop skid with pumps, controls, expansion management, and make-up.
JFHB is a VFD constant-pressure booster for break tanks. JFWZ is a non-negative-pressure booster designed for direct connection to municipal water mains.
No. JFHB requires approved suction conditions (such as a break tank). For direct municipal connection without a tank, specify JFWZ where permitted by local authorities.
Yes. JFWZ includes a bypass direct-flow path that supplies water using municipal residual pressure without starting the booster pumps, saving electricity.
No. The manifold physically splits and merges the circuits. Each individual branch still requires its own balancing valve (DRV, KPF, or BYF).
Not as a bare tank line item. Pumps, sensors, control panel, and valves are selected separately when a complete packaged pressurization set is ordered.
JFWP is the integrated expansion and pressurization skid. JFDY provides a bladder pressure-volume buffer where separate pumps are used.
Only when the plant includes a steam boiler system with recoverable condensate. It is not part of a standard chilled-water-only plant room.
No. 800X is a system-level differential-pressure bypass valve for chiller headers. Branch balancing uses DRV, KPF, or BYF valves.
System type (closed vs open), flow rate, pump head, static height, closed water volume, municipal pressure profile, and control voltage.
JFDY is documented as the bladder vessel; do not assume pumps and control cabinets are included unless quoted as a packaged set.
Direct-mains non-negative-pressure boosting is subject to municipal water authority regulations; confirm local approval before specifying JFWZ.
Standard water distributors/collectors do not balance circuits or provide decoupling; install branch balancing valves and low-loss headers where required.
JFLN condensate recovery units belong exclusively to steam/condensate systems; do not specify on standard hydronic cooling loops.
Send your loop water volume, static head, domestic booster demand, municipal pressure profile, and manifold branch schedule. YONGFAN hydronic engineers will size expansion skids, model booster curves, and supply submittal drawings.
