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(For refrigeration systems only)
- Model Number Breakdown
| モデルパーツ | 説明 |
| PM | Series designation for pilot‑operated main valves, used for pressure and temperature regulation in refrigeration systems |
| 1 | Series code; PM1 series features a single pilot port for basic control requirements |
| 32 | Nominal size, corresponding to DN32 (1‑1/4 inch) 繋がり, matched to refrigerant flow requirements |
- 主要な技術仕様
| アイテム | 価値 | 注記 |
| 正式注文コード | 027F3006 (標準), 027F1936 (legacy) | Danfoss global product number |
| Max Working Pressure | 28 bar g (406 psi g) | Suitable for medium‑ and high‑pressure refrigeration systems |
| 温度範囲 | -60°C to +120°C (-76°F to +248°F) | Compatible with most industrial refrigeration applications |
| Approved Refrigerants | HCFC, HFC, R717 (ammonia), R744 (CO₂) | Not suitable for flammable hydrocarbons |
| Body Material | GGG‑40.3 (ductile cast iron) | 高強度, corrosion resistant, ideal for refrigeration environments |
| Connection Type | Flanged (PN16/PN25) | Standard industrial refrigeration connection interface |
| Pilot Port | 1 (characteristic of PM1 series) | Can connect one pilot valve for pressure/temperature control |
| Flow Coefficient | Kv = 50 m3/h | Maximum flow capacity at rated pressure differential |
- 主な特長
- Pilot-Operated Principle
Main valve operation is fully driven by control pressure from the pilot valve; no built-in actuator
Can be combined with various Danfoss pilot valves (例えば, CVP pressure pilots, TVP temperature pilots, PML solenoid pilots) for multifunctional control
Full-stroke design with minimum opening pressure differential of only 0.2 bar g, ensuring stable operation at low loads
- Structure & 信頼性
Externally coated with ICS 25-150 zinc-chromium coating for enhanced corrosion resistance
Internal seals use refrigerant-resistant materials for long-term leak-free operation
Can be mounted horizontally or vertically for flexible installation
- Control Accuracy
V-shaped regulating cone for optimum control accuracy under partial load
Fast response; pressure fluctuation controlled within ±0.1 bar
Enables precise pressure and temperature control to maintain stable system operation
- 代表的な用途
- Refrigeration System Functions
High-side pressure control (condenser pressure regulation)
Low-side pressure control (evaporator pressure regulation)
Wet/dry suction line regulation to prevent compressor liquid slugging
Liquid line regulation (under non-phase-change conditions)
- Industrial Fields
Food and beverage freezing and cold storage systems
Low-temperature processes in chemical and pharmaceutical industries
Central air conditioning for large commercial buildings
Industrial chiller control
- インストール & Selection Guidelines
- インストール要件
Vertical installation recommended with pilot port facing upward for easy maintenance and venting
Thoroughly clean piping before installation to prevent contaminants from entering the valve body and damaging seals
Use standard-compliant bolts and gaskets for flanged connections, tightened to specified torque
- Selection Principles
Select appropriate size based on maximum system flow; PM1-32 is designed for medium flow requirements
Consider system working pressure and temperature to ensure operation within rated limits
Choose matching pilot valve type (pressure/temperature/solenoid) to achieve desired control function
- Maintenance Notes
Regularly inspect pilot port seals to prevent refrigerant leakage
Check valve operability before restart after long shutdown
For low-temperature applications (-50°C to -60°C), replace bolts with A4-80 stainless steel
- 代替モデル & Cross-Brand Comparison
6.1 Danfoss Internal Replacements
| モデル | 特徴 | 応用 |
| PM1‑32‑40 | Upgraded version with optimized internal flow path | Systems requiring higher flow capacity |
| ICS1‑32 | New ICS series, working pressure up to 52 bar g | High‑pressure CO₂ refrigeration systems |
| PME1‑32 | Multifunctional type supporting multiple parallel pilot valves | Complex control requirements |
6.2 Cross-Brand Equivalents
| Danfoss PM1‑32 | Alternative Brand Model | Functional Match |
| PM1‑32 | Emerson ALCO EVR32 | ★★★★☆ Same pressure control function, matching connection dimensions |
| Sporlan WVE‑32 | ★★★★☆ Comparable temperature control accuracy, slight material differences | |
| Castel CP32M | ★★★★ Same pilot‑operated principle, compatible refrigerant range | |
| Saginomiya PMD‑32 | ★★★☆ Slightly different structural design, similar control response time |
- Functional Expansion & Combined Applications
The PM1-32 can achieve multiple control functions when combined with different types of pilot valves:
- Pressure control: Combined with CVP constant pressure pilots to maintain stable system pressure
- Temperature control: Combined with TVP temperature pilots to regulate flow based on temperature signals
- On-off control: Combined with PML solenoid pilots for fast switching of refrigerant circuits
- 複雑な制御: Multiple pilot valves connected via external piping for multifunctional composite control
The Danfoss PM1-32 is a high-performance, high-reliability pilot-operated main valve specifically designed for DN32 refrigeration systems, delivering precise pressure and temperature control. Its single pilot port and compact structure make it widely used in small-to-medium industrial refrigeration systems, especially in food freezing, chemical cooling, and other applications requiring stable control. By combining with various pilot valves, it can flexibly realize multiple control functions to meet diverse application needs.
Below is a ready-to-use engineering selection version compiled according to official Danfoss specifications:
Complete PM1 series model list + key differences between PM1 / PM3 + pilot valve selection table.
- Complete Model List: Danfoss PM1 Series (Refrigeration Main Valves)
PM1 is a single pilot port pilot-operated main valve, flanged, PN16 / PN25, for general refrigeration systems.
| Full Model | Nominal Diameter | Connection Standard | Kv Value (m3/h) | Common Order Code | Flow Application |
| PM1‑15 | DN15 | PN16/25 | 12 | 027F3000 | Small capacity units |
| PM1‑20 | DN20 | PN16/25 | 18 | 027F3001 | - |
| PM1‑25 | DN25 | PN16/25 | 28 | 027F3003 | - |
| PM1‑32 | DN32 | PN16/25 | 50 | 027F3006 | Medium capacity (most common) |
| PM1‑40 | DN40 | PN16/25 | 70 | 027F3008 | - |
| PM1‑50 | DN50 | PN16/25 | 100 | 027F3010 | Large capacity units |
General Specifications (consistent across the series)
Max working pressure: 28 バー
温度範囲: -60℃ ~ +120℃
Body material: GGG40.3 ductile iron
Approved refrigerants: HFC / HCFC / NH₃ / CO₂
取り付け: horizontal or vertical
- Key Differences Between PM1 and PM3 Series
Direct comparison to avoid selection confusion:
| アイテム | PM1 Series | PM3 Series |
| Number of pilot ports | 1 (top single port) | 2 (two side ports) |
| Control logic | Single signal control (pressure OR temperature) | Dual‑signal composite control (プレッシャー + temperature) |
| Typical use | Condenser pressure control, evaporator pressure control | Dual condenser pressure + temperature regulation, hot gas bypass |
| Valve structure | Simple, コンパクト, 低コスト | More complex, finer regulation |
| Size range | DN15 ~ DN50 | DN15 ~ DN100 |
| Interchangeability | Bodies not directly interchangeable at same size | - |
Simple rule:
Only one control signal → choose PM1
プレッシャー + temperature control required → choose PM3
- Pilot Valve Selection for PM1-32 (Most Common Combinations)
The PM1 main valve has no control function on its own and must be used with a pilot valve.
Below are the most frequently used pilot valves for PM1-32:
1) CVP Series Pressure Pilot Valves (Condenser / Evaporator Pressure Control)
| Pilot Model | Control Range | 応用 |
| CVP 04 | 0.3 ～ 4 バー | Low‑pressure evaporator pressure control |
| CVP 10 | 1.0 ～ 10 バー | Medium‑high pressure condenser pressure control |
| CVP 20 | 2.0 ～ 20 バー | High‑pressure systems, CO₂ systems |
Combination: PM1-32 + CVP10 → Most common condenser pressure regulating valve
2) TVP Series Temperature Pilot Valves (Superheat / Temperature Control)
| Pilot Model | 温度範囲 | 応用 |
| TVP 1 | -25 ~ +10℃ | Low‑temperature refrigeration, cold storage |
| TVP 2 | -10 ~ +30℃ | General air conditioning, water chillers |
| TVP 3 | +10 ~ +50℃ | Heat pumps, high‑temperature applications |
3) PML Series Solenoid Pilot Valves (On-Off Control)
| モデル | Voltage | 関数 |
| PML 4 | 230V / 115V / 24Vと | Solenoid switch for hot gas bypass, circuit isolation |
4) MBV Series Differential Pressure Bypass Pilots
MBV 1 … 10 バー
Commonly used for: compressor differential pressure bypass, anti-surge control
- Additional Key Parameters for PM1-32 (Engineering Installation)
Minimum opening pressure differential: 0.2 バー
Flange standard: で 1092-1 PN16 / PN25
Seal material: NBR (標準) / HNBR (ammonia / high temperature)
重さ: PM1-32 ≈ 4.0 kg
Flow direction: marked with arrow on body; non-reversible
- Functional Equivalent Models (Cross-Brand)
| ブランド | Equivalent Model | Match Rating |
| ダンフォス | ICS1‑32 | Upgraded, higher pressure rating |
| Emerson ALCO | EVR 32 / OVE 32 | ★★★★★ |
| Sporlan | WVE‑32 | ★★★★☆ |
| Castel | CP32M | ★★★★ |
| Saginomiya | PMD‑32 | ★★★☆ |
Complete Range of Danfoss Refrigeration System Valves
Danfoss offers a full line of valves for refrigeration systems, covering applications from residential air conditioning to large-scale industrial refrigeration. Below is a detailed functional classification including core models, technical features, and applications for engineering selection and system design.
- Expansion Valves (Core Throttling Elements)
Expansion valves are the “heart” of refrigeration systems, responsible for throttling, pressure reduction, and flow control. They fall into two main categories: Thermostatic Expansion Valves (TXV) and Electronic Expansion Valves (EEV).
1.1 Thermostatic Expansion Valve (TXV) シリーズ
| シリーズ | Core Models | 応用 | 主な特長 |
| TU/TC | TU01‑16, TC01‑08 | Commercial / industrial refrigeration, stainless steel | Bi‑directional flow, high corrosion resistance, suitable for R717 (NH₃), R744 (CO₂) |
| TR6 | TR6A/TR6B/TR6C | Residential AC, heat pumps, light commercial | Hermetic design, compatible with R410A/R32 and other new refrigerants |
| TGE | TGE 06‑32 | Standard refrigerant systems | コンパクトな設計, environmentally friendly, non‑standard refrigerant versions available |
| TD1/TDE1 | TD1 06‑22, TDE1 06‑22 | General refrigeration systems | Controls based on evaporator outlet superheat, 簡単な取り付け |
| T2/TE2 | T2 06‑22, TE2 06‑22 | Air conditioning / refrigeration systems | Built‑in strainer reduces system maintenance |
主な利点:
Precise superheat control for efficient evaporator operation
Compatible with a wide range of refrigerants (HCFC, HFC, natural refrigerants)
Some models support bi-directional flow, simplifying heat pump system design
1.2 Electronic Expansion Valve (EEV) シリーズ
| シリーズ | Core Models | Control Accuracy | 応用 |
| ETS | ETS 5M/8M/175L/250L/400L/500L | ±0.1% | Air conditioning, precision refrigeration |
| ICM | ICM 15‑100 | ±0.5% | Industrial refrigeration, wide temperature range -60℃~120℃ |
| AKVA | AKVA 15‑50 | High stability | Industrial refrigeration, compatible with Danfoss and third‑party controllers |
主な利点:
Precise flow regulation across full operating conditions, improving system efficiency by 10–15%
Fast response, ideal for inverter-driven and complex control systems
Enables multi-parameter control including superheat, temperature, and pressure
- Solenoid Valves (System On-Off Control)
Solenoid valves provide fast on-off control of refrigerant circuits, available in direct-acting and pilot-operated versions.
2.1 General-Purpose Solenoid Valves
| シリーズ | Core Models | メディア | 主な特長 |
| EVR® | EVR 03‑32 | Liquid, suction, hot gas lines | Direct / pilot operated, compatible with most refrigerants (including flammable types); coils sold separately |
| CSV | CSV 2‑22 | Fluorinated refrigerant systems | Direct / pilot operated for refrigeration, freezing, and air conditioning |
| EVUL | EVUL 03‑10 | Compact refrigeration systems | Normally closed, small size, flexible installation |
| EVRA | EVRA 03‑10 | Air conditioning systems | Designed specifically for capacity control, hot gas bypass, liquid injection |
2.2 Special-Application Solenoid Valves
EVS: Safety solenoid valves for hazardous environments
EVM: Miniature solenoid valves for small refrigeration equipment
EVRM: Manual reset type for critical safety circuits
- Pilot-Operated Main Valves (Core Pressure / Temperature Control)
Pilot-operated main valves are driven by control pressure from pilot valves to achieve high-precision pressure or temperature regulation. They are available in single pilot port (PM1) and dual pilot port (PM3) シリーズ.
3.1 PM Series Main Valves
| シリーズ | Core Models | Pilot Ports | 応用 |
| PM1 | PM1‑15 ~ PM1‑50 | 1 | Condenser pressure control, evaporator pressure control |
| PM3 | PM3‑15 ~ PM3‑100 | 2 | Dual condenser pressure + temperature regulation, hot gas bypass |
| ICS Flexline™ | ICS1‑15 ~ ICS1‑100 | 1 | High‑pressure CO₂ systems, working pressure up to 52 バー |
3.2 Matching Pilot Valve Series
| Pilot Type | Core Models | Control Function | Compatible Main Valves |
| CVP Pressure Pilot | CVP 04/10/20 | Pressure control (0.3~20 bar) | Full PM1/PM3/ICS series |
| TVP Temperature Pilot | TVP 1/2/3 | Temperature control (-25℃～+50℃) | Full PM1/PM3/ICS series |
| PML Solenoid Pilot | PML 4 | On‑off control | Full PM1/PM3/ICS series |
| MBV Differential Pressure Pilot | MBV 1‑10 | Differential pressure bypass control | Full PM1/PM3/ICS series |
- マニュアル / Multi-Function Industrial Valves (System Operation & メンテナンス)
The Danfoss SVL Flexline™ series is the “all-rounder” of industrial refrigeration, featuring modular design with five interchangeable function modules sharing the same valve body.
4.1 SVL Flexline™ Multi-Function Valves
| Function Module | Model Code | コア機能 | 応用 |
| SVA Shut‑Off Valve | SVA 15‑100 | Line isolation | System maintenance, equipment isolation |
| REG‑S Manual Regulating Valve | REG‑S 15‑100 | Precise flow adjustment | Manual flow control, pressure balancing |
| CKV Check Valve | CKV 15‑100 | Prevents reverse refrigerant flow | Compressor protection, line backflow prevention |
| NRV Safety Valve | NRV 15‑100 | Overpressure protection | System safety relief |
| FIA Strainer | FIA 15‑100 | Contaminant filtration | Protects downstream precision components |
主な利点:
Modular design reduces inventory cost and enables flexible installation
Sizes DN15~DN100, working pressure up to 140 バー
Externally coated with ICS 25-150 zinc-chromium coating for excellent corrosion resistance
- 安全性 & Protection Valves (System Safety Assurance)
5.1 Safety Valve Series
| シリーズ | Core Models | Working Pressure | 応用 |
| NRV | NRV 06‑32 | 10~40 bar | Refrigeration system overpressure protection |
| KVS | KVS 06‑50 | 10~40 bar | High‑pressure system safety protection |
| RV | RV 06‑50 | 5~40 bar | General air conditioning / refrigeration systems |
5.2 Check Valve Series
| シリーズ | Core Models | Structural Features | 応用 |
| CKV | CKV 15‑100 | Spring‑loaded, fast closing | Compressor discharge, liquid lines |
| CHV | CHV 06‑32 | コンパクト, bi‑directional flow | Heat pumps, small refrigeration equipment |
| DHV | DHV 06‑32 | High flow, low pressure drop | Main circuits in industrial refrigeration systems |
- Special-Function Valves (System Optimization & 拡大)
6.1 Reversing Valves (Four-Way)
| シリーズ | Core Models | 応用 | 主な特長 |
| 4W | 4W 08‑32 | Heat pumps, air conditioning units | Switches between cooling and heating modes, 高い信頼性 |
6.2 Hot Gas Bypass Valves
| シリーズ | Core Models | 制御方法 | 応用 |
| AKV | AKV 06‑22 | Pressure control | Prevents evaporator frosting, stabilizes system pressure |
| HGP | HGP 06‑22 | Temperature control | Precisely controls superheat, protects compressors |
6.3 Valves for Transcritical CO₂ Systems
| シリーズ | Core Models | Working Pressure | 応用 |
| ICM+ICAD B | ICM 15‑100 + ICAD B | 31.4~100 bar | Transcritical CO₂ systems, digital integrated control |
| Large Ejectors | DEJ 100‑300 | Ultra‑high pressure | Industrial transcritical CO₂ systems for efficiency improvement |
- Danfoss Valve Selection Guide
7.1 Selection by System Type
| System Type | Recommended Valve Combination | Key Considerations |
| Residential Air Conditioning | TR6 TXV + EVR solenoid valve + CHV check valve | Small size, high efficiency, cost‑effective |
| Commercial Refrigeration | TU TXV + PM1 main valve + CVP pilot | Control accuracy, reliability, ease of maintenance |
| Industrial Refrigeration (Ammonia Systems) | TU stainless steel TXV + PM3 main valve + TVP pilot + SVL valves | 耐食性, safety, system stability |
| Transcritical CO₂ Systems | ICS main valve + CVP20 pilot + ICM EEV | High‑pressure compatibility (≥52 bar), precise control |
7.2 主要な選択パラメータ
- Refrigerant type: Confirm compatibility with R410A/R32/R717/R744 etc.
- Working pressure: Select valve with rated pressure ≥ maximum system pressure
- 温度範囲: Choose valves suitable for system min/max temperatures
- Flow requirement: Calculate using Kv value to ensure sufficient flow capacity
- インストール: Consider flanged / threaded / welded connections and space constraints
Danfoss refrigeration valves are known for high reliability, precise control, and wide compatibility, covering the full process of refrigeration systems: throttling, コントロール, safety, and maintenance. From miniature residential air conditioners to large industrial CO₂ refrigeration systems, Danfoss provides matched valve solutions.
Selection should be based on system type, refrigerant, operating parameters, and control requirements, referring to official Danfoss catalogs or technical support to ensure efficient and stable system operation.
